四年级下学期数学递等式300道

一、运算顺序基础回顾递等式计算是小学数学四则运算的重要组成部分，要求同学们在计算过程中清晰呈现每一步的运算过程，不仅能培养良好的计算习惯，更能提升逻辑思维能力。四年级下学期的递等式计算主要涉及不含括号的两步及三步混合运算、含有小括号的混合运算，以及简单的加减乘除混合应用。同学们在进行递等式计算时，首先要牢记并严格遵守以下运算顺序规则：1.同级运算：只有加减或只有乘除的运算，按照从左到右的顺序依次计算。2.不同级运算：既有加减又有乘除的运算，要先算乘除法，后算加减法。3.带括号运算：算式中有小括号的，要先算小括号里面的，再算小括号外面的。小括号里面如果含有多种运算，同样遵循上述1、2条规则。二、不含括号的两步运算专项练习以下是针对不同运算组合的两步运算递等式练习，同学们可以进行针对性训练，熟练掌握基本运算顺序。（一）只有加减的两步运算1.56+28+152.98-36-253.45+65-704.82-47+395.33+57+226.100-63-287.29+71-448.68-29+519.48+36+1210.91-54-2711.37+53-6012.76-38+2913.25+65+1814.88-49-2115.52+38-4516.93-57+2817.36+44+1918.100-37-4319.41+59-7220.69-32+4521.28+62+1522.85-46-2923.55+35-6624.78-39+4125.39+51+2326.94-58-2627.43+57-8028.81-43+3729.51+39+1730.96-62-2831.32+68-5532.73-35+4933.46+44+1634.89-52-2935.57+33-7136.84-46+3837.29+61+2238.93-59-2539.44+56-6740.79-38+4241.35+55+1942.87-48-2343.50+40-6344.86-49+3545.31+69+2446.95-56-2747.47+53-7648.83-45+3849.38+62+1650.92-57-26（二）只有乘除的两步运算1.12×3×42.72÷8÷33.15×4÷64.64÷8×55.11×5×26.81÷9÷37.20×3÷58.42÷7×69.13×2×510.90÷6÷511.25×4÷1012.56÷8×713.9×6×214.63÷7÷315.18×5÷916.48÷6×417.14×3×318.70÷5÷719.22×4÷1120.54÷9×821.8×7×222.84÷12÷723.24×3÷824.60÷5×325.16×2×626.96÷8÷427.30×5÷628.40÷4×929.7×8×330.75÷5÷331.21×4÷732.52÷13×633.10×9×134.88÷11÷235.27×3÷936.66÷6×237.17×5×238.100÷10÷539.32×3÷840.45÷9×741.6×9×442.99÷9÷1143.33×2÷644.50÷2×845.19×4×246.80÷16÷547.35×2÷748.63÷3×449.5×12×350.78÷13÷3（三）既有乘除又有加减的两步运算1.25+5×62.80-18÷23.12×4+364.90÷3-255.36+42÷76.72-8×57.9×7-458.60+40÷59.40-24÷610.15×3+2811.81÷9+3712.65-11×513.7×6+5814.95-60÷315.49÷7+6316.80-6×917.11×8-5618.30+72÷819.50-35÷720.13×5+3521.64÷8+4922.70-9×723.8×8+2824.100-40÷425.56÷8+6726.85-7×827.12×5-4528.40+54÷929.60-42÷630.14×4+3831.72÷9+5332.90-12×633.9×5+6534.88-72÷835.63÷7+5836.92-8×937.15×6-6038.50+63÷739.75-50÷540.16×3+4241.80÷10+5642.76-13×443.6×9+4744.99-81÷945.48÷6+7246.84-5×1247.10×7-3048.55+40÷849.70-56÷750.17×3+49三、三步混合运算专项练习三步混合运算在两步运算的基础上增加了计算步骤，更能考验同学们对运算顺序的掌握和细心程度。计算时务必看清数字和运算符号，按步骤逐步计算。（一）不含括号的三步混合运算1.25+15×3+202.90-64÷8-453.18×2+36÷64.75-12×5+305.40+42÷7+536.88-8×6-207.9×3+5×78.100-60÷3-259.56÷8+6×910.80-15×4+2611.30+25×2+3512.95-72÷9-5013.14×4+48÷414.80-11×5+3715.55+63÷7+2816.90-9×7-1817.8×5+7×618.100-49÷7-6519.64÷8+9×820.70-13×3+3921.22+30×3+2822.85-40÷5-4423.15×3+54÷924.90-12×6+3625.45+56÷8+4726.88-6×8-2427.10×6+8×528.99-63÷7-5829.72÷9+11×430.80-14×5+4031.28+16×4+3232.92-54÷6-5533.16×2+60÷534.85-15×4+3535.50+70÷10+6336.96-8×8-2037.12×4+9×338.100-56÷8-6339.81÷9+12×540.75-16×3+4241.26+22×4+3042.90-36÷4-5743.13×5+63÷744.80-10×6+4645.58+48÷6+3946.94-7×9-2147.11×7+6×848.90-64÷16-7549.42÷7+13×650.88-15×5+47（二）含有小括号的混合运算1.(25+15)×32.80-(18+22)3.12×(4+5)4.(90-45)÷55.36+(42÷7)6.72-(8×5)7.(9+7)×68.95-(60÷3)9.(49+21)÷710.80-(6×9)11.11×(8-4)12.(30+42)÷813.50-(35-28)14.13×(5+2)15.(64+16)÷816.70-(9×7-20)17.8×(8+6)18.100-(40+40)19.(56-16)÷820.85-(7×8+9)21.(25+35)×222.90÷(12-9)23.14×(4+3)24.95-(60-35)25.(49+63)÷726.80-(6+9)×427.12×(5+4)28.(100-64)÷629.56÷(8+6)30