2026秋小学数学四升五年龄问题（拓展思维）20天暑假专项提升训练

2026秋小学数学四升五年龄问题（拓展思维）20天暑假专项提升训练第一天年龄问题基础入门（差倍基础：求几年后倍数）训练重点：熟练掌握年龄差不变核心，初步学会根据今年年龄，计算几年后两人年龄成指定倍数关系，步骤：算年龄差→求倍数对应年龄→计算年数1.小明今年6岁，爸爸今年30岁，几年后爸爸的年龄是小明的4倍？________________________________________________________________________________________________________________________________2.小红今年5岁，妈妈今年25岁，几年后妈妈的年龄是小红的3倍？________________________________________________________________________________________________________________________________3.小亮今年7岁，爷爷今年49岁，几年后爷爷的年龄是小亮的5倍？________________________________________________________________________________________________________________________________4.小雨今年4岁，姐姐今年16岁，几年后姐姐的年龄是小雨的3倍？________________________________________________________________________________________________________________________________5.小东今年8岁，舅舅今年32岁，几年后舅舅的年龄是小东的3倍？________________________________________________________________________________________________________________________________6.小雅今年3岁，姑姑今年21岁，几年后姑姑的年龄是小雅的4倍？________________________________________________________________________________________________________________________________7.小宇今年9岁，伯伯今年45岁，几年后伯伯的年龄是小宇的4倍？________________________________________________________________________________________________________________________________8.萌萌今年6岁，小姨今年24岁，几年后小姨的年龄是萌萌的3倍？________________________________________________________________________________________________________________________________9.浩浩今年5岁，爸爸今年35岁，几年后爸爸的年龄是浩浩的6倍？________________________________________________________________________________________________________________________________10.琪琪今年7岁，妈妈今年28岁，几年后妈妈的年龄是琪琪的3倍？________________________________________________________________________________________________________________________________第二天年龄问题基础入门（差倍基础：求几年前倍数）训练重点：掌握几年前倍数问题解题逻辑，区分前后时间差异，牢记年龄差不变，学会逆向推导过往年龄1.小明今年10岁，爸爸今年34岁，几年前爸爸的年龄是小明的4倍？________________________________________________________________________________________________________________________________2.小红今年12岁，妈妈今年36岁，几年前妈妈的年龄是小红的5倍？________________________________________________________________________________________________________________________________3.小亮今年9岁，爷爷今年57岁，几年前爷爷的年龄是小亮的7倍？________________________________________________________________________________________________________________________________4.小雨今年11岁，姐姐今年23岁，几年前姐姐的年龄是小雨的3倍？________________________________________________________________________________________________________________________________5.小东今年13岁，舅舅今年37岁，几年前舅舅的年龄是小东的3倍？________________________________________________________________________________________________________________________________6.小雅今年8岁，姑姑今年26岁，几年前姑姑的年龄是小雅的5倍？________________________________________________________________________________________________________________________________7.小宇今年14岁，伯伯今年50岁，几年前伯伯的年龄是小宇的4倍？________________________________________________________________________________________________________________________________8.萌萌今年10岁，小姨今年28岁，几年前小姨的年龄是萌萌的4倍？________________________________________________________________________________________________________________________________9.浩浩今年12岁，爸爸今年42岁，几年前爸爸的年龄是浩浩的5倍？________________________________________________________________________________________________________________________________10.琪琪今年9岁，妈妈今年33岁，几年前妈妈的年龄是琪琪的6倍？________________________________________________________________________________________________________________________________第三天和差题型入门（已知和差求年龄基础题）训练重点：熟练运用和差公式，掌握已知两人年龄和、年龄差，快速求解两人各自年龄，夯实基础公式应用1.姐弟两人年龄和28岁，姐姐比弟弟大4岁，姐弟两人各多少岁？________________________________________________________________________________________________________________________________2.父子两人年龄和40岁，爸爸比儿子大28岁，父子两人各多少岁？________________________________________________________________________________________________________________________________3.母女两人年龄和36岁，妈妈比女儿大24岁，母女两人各多少岁？________________________________________________________________________________________________________________________________4.兄妹两人年龄和22岁，哥哥比妹妹大6岁，兄妹两人各多少岁？________________________________________________________________________________________________________________________________5.爷孙两人年龄和60岁，爷爷比孙子大48岁，爷孙两人各多少岁？________________________________________________________________________________________________________________________________6.叔侄两人年龄和38岁，叔叔比侄子大22岁，叔侄两人各多少岁？________________________________________________________________________________________________________________________________7.姐妹两人年龄和30岁，姐姐比妹妹大8岁，姐妹两人各多少岁？________________________________________________________________________________________________________________________________8.父子两人年龄和52岁，爸爸比儿子大30岁，父子两人各多少岁？________________________________________________________________________________________________________________________________9.母女两人年龄和42岁，妈妈比女儿大26岁，母女两人各多少岁？________________________________________________________________________________________________________________________________10.兄弟两人年龄和26岁，哥哥比弟弟大4岁，兄弟两人各多少岁？________________________________________________________________________________________________________________________________第四天差倍题型巩固（几年后倍数进阶题）训练重点：提升差倍问题计算熟练度，适配稍大数值，规避计算失误，规范解题步骤1.小浩今年8岁，外公今年56岁，几年后外公的年龄是小浩的6倍？________________________________________________________________________________________________________________________________2.小琳今年7岁，阿姨今年31岁，几年后阿姨的年龄是小琳的4倍？________________________________________________________________________________________________________________________________3.小峰今年9岁，爸爸今年39岁，几年后爸爸的年龄是小峰的4倍？________________________________________________________________________________________________________________________________4.小悦今年6岁，舅舅今年30岁，几年后舅舅的年龄是小悦的5倍？________________________________________________________________________________________________________________________________5.小阳今年10岁，爷爷今年58岁，几年后爷爷的年龄是小阳的5倍？________________________________________________________________________________________________________________________________6.小彤今年5岁，妈妈今年29岁，几年后妈妈的年龄是小彤的5倍？________________________________________________________________________________________________________________________________7.小泽今年11岁，伯伯今年47岁，几年后伯伯的年龄是小泽的4倍？________________________________________________________________________________________________________________________________8.小诺今年4岁，小姨今年28岁，几年后小姨的年龄是小诺的6倍？________________________________________________________________________________________________________________________________9.小程今年12岁，爸爸今年48岁，几年后爸爸的年龄是小程的3倍？________________________________________________________________________________________________________________________________10.小冉今年8岁，妈妈今年32岁，几年后妈妈的年龄是小冉的3倍？________________________________________________________________________________________________________________________________第五天差倍题型巩固（几年前倍数进阶题）训练重点：强化逆向思维，熟练解决几年前倍数问题，区分年龄增减逻辑，精准计算年数1.小浩今年14岁，外公今年62岁，几年前外公的年龄是小浩的6倍？________________________________________________________________________________________________________________________________2.小琳今年13岁，阿姨今年37岁，几年前阿姨的年龄是小琳的4倍？________________________________________________________________________________________________________________________________3.小峰今年15岁，爸爸今年45岁，几年前爸爸的年龄是小峰的4倍？________________________________________________________________________________________________________________________________4.小悦今年12岁，舅舅今年36岁，几年前舅舅的年龄是小悦的5倍？________________________________________________________________________________________________________________________________5.小阳今年16岁，爷爷今年64岁，几年前爷爷的年龄是小阳的5倍？________________________________________________________________________________________________________________________________6.小彤今年11岁，妈妈今年35岁，几年前妈妈的年龄是小彤的5倍？________________________________________________________________________________________________________________________________7.小泽今年17岁，伯伯今年53岁，几年前伯伯的年龄是小泽的4倍？________________________________________________________________________________________________________________________________8.小诺今年10岁，小姨今年34岁，几年前小姨的年龄是小诺的6倍？________________________________________________________________________________________________________________________________9.小程今年18岁，爸爸今年54岁，几年前爸爸的年龄是小程的3倍？________________________________________________________________________________________________________________________________10.小冉今年13岁，妈妈今年37岁，几年前妈妈的年龄是小冉的3倍？________________________________________________________________________________________________________________________________第六天和差题型巩固（隐含条件和差题）训练重点：挖掘题目隐含年龄差，无需直接告知差值，通过人物关系推导，灵活运用和差公式1.今年兄妹二人年龄一共24岁，哥哥比妹妹大5岁，兄妹今年各多少岁？________________________________________________________________________________________________________________________________2.今年父子年龄和46岁，爸爸比儿子大29岁，父子今年各多少岁？________________________________________________________________________________________________________________________________3.今年母女年龄和40岁，妈妈比女儿大25岁，母女今年各多少岁？________________________________________________________________________________________________________________________________4.今年兄弟年龄和32岁，哥哥比弟弟大7岁，兄弟今年各多少岁？________________________________________________________________________________________________________________________________5.今年爷孙年龄和68岁，爷爷比孙子大52岁，爷孙今年各多少岁？________________________________________________________________________________________________________________________________6.今年叔侄年龄和44岁，叔叔比侄子大24岁，叔侄今年各多少岁？________________________________________________________________________________________________________________________________7.今年姐妹年龄和34岁，姐姐比妹妹大9岁，姐妹今年各多少岁？________________________________________________________________________________________________________________________________8.今年父子年龄和58岁，爸爸比儿子大31岁，父子今年各多少岁？________________________________________________________________________________________________________________________________9.今年母女年龄和48岁，妈妈比女儿大27岁，母女今年各多少岁？________________________________________________________________________________________________________________________________10.今年姐弟年龄和29岁，姐姐比弟弟大6岁，姐弟今年各多少岁？________________________________________________________________________________________________________________________________第七天差倍题型综合（前后倍数混合基础）训练重点：混合练习几年前、几年后倍数问题，学会快速判断题型类型，精准选用解题方法1.小琪今年7岁，爸爸今年31岁，几年后爸爸年龄是小琪的5倍？________________________________________________________________________________________________________________________________2.小航今年12岁，舅舅今年36岁，几年前舅舅年龄是小航的4倍？________________________________________________________________________________________________________________________________3.小妍今年6岁，妈妈今年30岁，几年后妈妈年龄是小妍的4倍？________________________________________________________________________________________________________________________________4.小斌今年14岁，爷爷今年60岁，几年前爷爷年龄是小斌的5倍？________________________________________________________________________________________________________________________________5.小璐今年9岁，阿姨今年33岁，几年后阿姨年龄是小璐的4倍？________________________________________________________________________________________________________________________________6.小恒今年11岁，伯伯今年43岁，几年前伯伯年龄是小恒的4倍？________________________________________________________________________________________________________________________________7.小伊今年5岁，小姨今年29岁，几年后小姨年龄是小伊的6倍？________________________________________________________________________________________________________________________________8.小昱今年13岁，爸爸今年41岁，几年前爸爸年龄是小昱的3倍？________________________________________________________________________________________________________________________________9.小禾今年8岁，外公今年52岁，几年后外公年龄是小禾的5倍？________________________________________________________________________________________________________________________________10.小喆今年10岁，妈妈今年34岁，几年前妈妈年龄是小喆的4倍？________________________________________________________________________________________________________________________________第八天和差题型综合（年龄和变化题型）训练重点：掌握“几年后年龄和、年龄差不变”规律，解决动态和差问题，突破固定题型思维局限1.今年姐弟年龄和20岁，姐姐比弟弟大4岁，3年后姐弟两人各多少岁？________________________________________________________________________________________________________________________________2.今年父子年龄和38岁，爸爸比儿子大28岁，5年后父子两人各多少岁？________________________________________________________________________________________________________________________________3.今年母女年龄和34岁，妈妈比女儿大24岁，2年后母女两人各多少岁？________________________________________________________________________________________________________________________________4.今年兄妹年龄和18岁，哥哥比妹妹大6岁，4年后兄妹两人各多少岁？________________________________________________________________________________________________________________________________5.今年爷孙年龄和56岁，爷爷比孙子大48岁，6年后爷孙两人各多少岁？________________________________________________________________________________________________________________________________6.今年叔侄年龄和32岁，叔叔比侄子大22岁，1年后叔侄两人各多少岁？________________________________________________________________________________________________________________________________7.今年姐妹年龄和26岁，姐姐比妹妹大8岁，7年后姐妹两人各多少岁？________________________________________________________________________________________________________________________________8.今年父子年龄和44岁，爸爸比儿子大30岁，8年后父子两人各多少岁？________________________________________________________________________________________________________________________________9.今年母女年龄和36岁，妈妈比女儿大26岁，3年后母女两人各多少岁？________________________________________________________________________________________________________________________________10.今年兄弟年龄和22岁，哥哥比弟弟大4岁，5年后兄弟两人各多少岁？________________________________________________________________________________________________________________________________第九天差倍题型拔高（倍数差值进阶）训练重点：突破整数简单倍数，适配稍复杂倍数关系，强化差倍模型应用，提升逻辑推理能力1.小聪今年9岁，爸爸今年33岁，几年后爸爸的年龄是小聪的4倍？________________________________________________________________________________________________________________________________2.小雯今年8岁，妈妈今年32岁，几年前妈妈的年龄是小雯的5倍？________________________________________________________________________________________________________________________________3.小锐今年10岁，爷爷今年54岁，几年后爷爷的年龄是小锐的5倍？________________________________________________________________________________________________________________________________4.小佳今年7岁，舅舅今年35岁，几年前舅舅的年龄是小佳的6倍？________________________________________________________________________________________________________________________________5.小航今年11岁，阿姨今年39岁，几年后阿姨的年龄是小航的4倍？________________________________________________________________________________________________________________________________6.小桐今年6岁，小姨今年30岁，几年前小姨的年龄是小桐的7倍？________________________________________________________________________________________________________________________________7.小烁今年12岁，伯伯今年48岁，几年后伯伯的年龄是小烁的3倍？________________________________________________________________________________________________________________________________8.小芮今年9岁，爸爸今年36岁，几年前爸爸的年龄是小芮的4倍？________________________________________________________________________________________________________________________________9.小远今年13岁，外公今年61岁，几年后外公的年龄是小远的5倍？________________________________________________________________________________________________________________________________10.小晴今年8岁，妈妈今年34岁，几年前妈妈的年龄是小晴的5倍？________________________________________________________________________________________________________________________________第十天和差题型拔高（反向推导题型）训练重点：已知未来年龄和、固定年龄差，反向求今年年龄，锻炼逆向思维，适配高阶应用题考点1.3年后，姐弟两人年龄和30岁，姐姐比弟弟大4岁，今年姐弟各多少岁？________________________________________________________________________________________________________________________________2.5年后，父子两人年龄和56岁，爸爸比儿子大28岁，今年父子各多少岁？________________________________________________________________________________________________________________________________3.2年后，母女两人年龄和40岁，妈妈比女儿大24岁，今年母女各多少岁？________________________________________________________________________________________________________________________________4.4年后，兄妹两人年龄和30岁，哥哥比妹妹大6岁，今年兄妹各多少岁？________________________________________________________________________________________________________________________________5.6年后，爷孙两人年龄和72岁，爷爷比孙子大48岁，今年爷孙各多少岁？________________________________________________________________________________________________________________________________6.1年后，叔侄两人年龄和36岁，叔叔比侄子大22岁，今年叔侄各多少岁？________________________________________________________________________________________________________________________________7.7年后，姐妹两人年龄和44岁，姐姐比妹妹大8岁，今年姐妹各多少岁？________________________________________________________________________________________________________________________________8.8年后，父子两人年龄和68岁，爸爸比儿子大30岁，今年父子各多少岁？________________________________________________________________________________________________________________________________9.3年后，母女两人年龄和48岁，妈妈比女儿大26岁，今年母女各多少岁？________________________________________________________________________________________________________________________________10.5年后，兄弟两人年龄和36岁，哥哥比弟弟大4岁，今年兄弟各多少岁？________________________________________________________________________________________________________________________________第十一天差倍综合训练（多倍数混合）训练重点：完全混合几年前、几年后不同倍数题型，快速辨析题型，熟练套用解题模型，提升解题速度1.小源今年8岁，爸爸今年32岁，几年后爸爸年龄是小源的3倍？________________________________________________________________________________________________________________________________2.小茜今年11岁，妈妈今年35岁，几年前妈妈年龄是小茜的4倍？________________________________________________________________________________________________________________________________3.小钧今年7岁，爷爷今年49岁，几年后爷爷年龄是小钧的5倍？________________________________________________________________________________________________________________________________4.小玥今年13岁，舅舅今年37岁，几年前舅舅年龄是小玥的3倍？________________________________________________________________________________________________________________________________5.小桐今年9岁，阿姨今年33岁，几年后阿姨年龄是小桐的4倍？________________________________________________________________________________________________________________________________6.小隆今年12岁，伯伯今年44岁，几年前伯伯年龄是小隆的4倍？________________________________________________________________________________________________________________________________7.小岚今年6岁，小姨今年30岁，几年后小姨年龄是小岚的5倍？________________________________________________________________________________________________________________________________8.小腾今年14岁，爸爸今年44岁，几年前爸爸年龄是小腾的3倍？________________________________________________________________________________________________________________________________9.小祎今年8岁，外公今年56岁，几年后外公年龄是小祎的6倍？________________________________________________________________________________________________________________________________10.小烁今年10岁，妈妈今年38岁，几年前妈妈年龄是小烁的5倍？________________________________________________________________________________________________________________________________第十二天和差综合训练（和差动态混合）训练重点：混合今年、未来年龄和差题型，灵活切换解题思路，熟练掌握年龄和、年龄差核心规律1.今年兄妹年龄和22岁，姐姐比弟弟大5岁，今年两人各几岁？4年后两人各几岁？________________________________________________________________________________________________________________________________2.今年父子年龄和42岁，爸爸比儿子大29岁，今年两人各几岁？6年后两人各几岁？________________________________________________________________________________________________________________________________3.今年母女年龄和38岁，妈妈比女儿大25岁，今年两人各几岁？2年后两人各几岁？________________________________________________________________________________________________________________________________4.今年兄弟年龄和28岁，哥哥比弟弟大7岁，今年两人各几岁？3年后两人各几岁？________________________________________________________________________________________________________________________________5.今年爷孙年龄和62岁，爷爷比孙子大50岁，今年两人各几岁？5年后两人各几岁？________________________________________________________________________________________________________________________________6.今年叔侄年龄和40岁，叔叔比侄子大23岁，今年两人各几岁？7年后两人各几岁？________________________________________________________________________________________________________________________________7.今年姐妹年龄和32岁，姐姐比妹妹大8岁，今年两人各几岁？1年后两人各几岁？________________________________________________________________________________________________________________________________8.今年父子年龄和50岁，爸爸比儿子大31岁，今年两人各几岁？4年后两人各几岁？________________________________________________________________________________________________________________________________9.今年母女年龄和44岁，妈妈比女儿大27岁，今年两人各几岁？8年后两人各几岁？________________________________________________________________________________________________________________________________10.今年姐弟年龄和25岁，姐姐比弟弟大6岁，今年两人各几岁？6年后两人各几岁？________________________________________________________________________________________________________________________________第十三天年龄问题易错题型专项（差倍纠错）训练重点：攻克学生高频易错点，规避“年龄同步变化忽略、倍数差值算错、年数颠倒”等问题，精准解题1.小华今年10岁，爸爸今年40岁，几年后爸爸年龄是小华的3倍？________________________________________________________________________________________________________________________________2.小丽今年12岁，妈妈今年42岁，几年前妈妈年龄是小丽的4倍？________________________________________________________________________________________________________________________________3.小浩今年8岁，爷爷今年56岁，几年后爷爷年龄是小浩的5倍？________________________________________________________________________________________________________________________________4.小妍今年9岁，舅舅今年33岁，几年前舅舅年龄是小妍的4倍？________________________________________________________________________________________________________________________________5.小峰今年11岁，阿姨今年39岁，几年后阿姨年龄是小峰的4倍？________________________________________________________________________________________________________________________________6.小悦今年7岁，小姨今年31岁，几年前小姨年龄是小悦的5倍？________________________________________________________________________________________________________________________________7.小阳今年13岁，伯伯今年49岁，几年后伯伯年龄是小阳的4倍？________________________________________________________________________________________________________________________________8.小彤今年10岁，爸爸今年40岁，几年前爸爸年龄是小彤的3倍？________________________________________________________________________________________________________________________________9.小泽今年12岁，外公今年60岁，几年后外公年龄是小泽的5倍？________________________________________________________________________________________________________________________________10.小诺今年8岁，妈妈今年32岁，几年前妈妈年龄是小诺的3倍？________________________________________________________________________________________________________________________________第十四天年龄问题易错题型专项（和差纠错）训练重点：纠正和差公式混用、年龄和变化计算错误、逆向推导失误等易错问题，夯实公式应用1.4年后姐弟年龄和34岁，姐姐比弟弟大4岁，今年姐弟各多少岁？________________________________________________________________________________________________________________________________2.6年后父子年龄和62岁，爸爸比儿子大28岁，今年父子各多少岁？________________________________________________________________________________________________________________________________3.3年后母女年龄和46岁，妈妈比女儿大24岁，今年母女各多少岁？________________________________________________________________________________________________________________________________4.5年后兄妹年龄和34岁，哥哥比妹妹大6岁，今年兄妹各多少岁？________________________________________________________________________________________________________________________________5.7年后爷孙年龄和76岁，爷爷比孙子大48岁，今年爷孙各多少岁？________________________________________________________________________________________________________________________________6.2年后叔侄年龄和40岁，叔叔比侄子大22岁，今年叔侄各多少岁？________________________________________________________________________________________________________________________________7.8年后姐妹年龄和48岁，姐姐比妹妹大8岁，今年姐妹各多少岁？________________________________________________________________________________________________________________________________8.1年后父子年龄和50岁，爸爸比儿子大30岁，今年父子各多少岁？________________________________________________________________________________________________________________________________9.4年后母女年龄和52岁，妈妈比女儿大26岁，今年母女各多少岁？________________________________________________________________________________________________________________________________10.6年后兄弟年龄和40岁，哥哥比弟弟大4岁，今年兄弟各多少岁？________________________________________________________________________________________________________________________________第十五天差倍题型拓展（高难度倍数题）训练重点：适配五阶拓展思维，解决高倍数、大数值差倍问题，锻炼严谨的逻辑推导能力1.小沐今年7岁，外公今年55岁，几年后外公的年龄是小沐的7倍？________________________________________________________________________________________________________________________________2.小亦今年14岁，爸爸今年46岁，几年前爸爸的年龄是小亦的4倍？________________________________________________________________________________________________________________________________3.小驰今年9岁，爷爷今年57岁，几年后爷爷的年龄是小驰的6倍？________________________________________________________________________________________________________________________________4.小纯今年12岁，舅舅今年42岁，几年前舅舅的年龄是小纯的5倍？________________________________________________________________________________________________________________________________5.小初今年8岁，阿姨今年36岁，几年后阿姨的年龄是小初的5倍？________________________________________________________________________________________________________________________________6.小渝今年15岁，小姨今年45岁，几年前小姨的年龄是小渝的4倍？________________________________________________________________________________________________________________________________7.小戈今年10岁，伯伯今年50岁，几年后伯伯的年龄是小戈的6倍？________________________________________________________________________________________________________________________________8.小棠今年11岁，爸爸今年47岁，几年前爸爸的年龄是小棠的4倍？________________________________________________________________________________________________________________________________9.小朔今年6岁，外公今年54岁，几年后外公的年龄是小朔的8倍？________________________________________________________________________________________________________________________________10.小柠今年13岁，妈妈今年49岁，几年前妈妈的年龄是小柠的4倍？________________________________________________________________________________________________________________________________第十六天和差题型拓展（复杂隐含和差题）训练重点：挖掘题目隐藏条件，解决无直接告知差值、和值变化的复杂和差年龄问题，提升综合分析能力1.姐弟两人，姐姐4年前的年龄等于弟弟2年后的年龄，今年两人年龄和26岁，姐弟今年各多少岁？________________________________________________________________________________________________________________________________2.父子两人，爸爸3年前的年龄等于儿子5年后的年龄，今年两人年龄和44岁，父子今年各多少岁？________________________________________________________________________________________________________________________________3.母女两人，妈妈2年后的年龄等于女儿6年后的年龄，今年两人年龄和38岁，母女今年各多少岁？________________________________________________________________________________________________________________________________4.兄妹两人，哥哥5年前的年龄等于妹妹3年后的年龄，今年两人年龄和24岁，兄妹今年各多少岁？________________________________________________________________________________________________________________________________5.爷孙两人，爷爷4年后的年龄等于孙子20年后的年龄，今年两人年龄和64岁，爷孙今年各多少岁？________________________________________________________________________________________________________________________________6.叔侄两人，叔叔6年前的年龄等于侄子4年后的年龄，今年两人年龄和42岁，叔侄今年各多少岁？________________________________________________________________________________________________________________________________7.姐妹两人，姐姐3年后的年龄等于妹妹7年后的年龄，今年两人年龄和30岁，姐妹今年各多少岁？________________________________________________________________________________________________________________________________8.父子两人，爸爸5年前的年龄等于儿子9年后的年龄，今年两人年龄和52岁，父子今年各多少岁？________________________________________________________________________________________________________________________________9.母女两人，妈妈4年后的年龄等于女儿8年后的年龄，今年两人年龄和40岁，母女今年各多少岁？________________________________________________________________________________________________________________________________10.兄弟两人，哥哥2年前的年龄等于弟弟4年后的年龄，今年两人年龄和28岁，兄弟今年