四年级下册简便运300道

一、写在前面简便运算是小学数学学习中的重要组成部分，它不仅能帮助同学们提高计算速度和准确性，更能培养大家的观察能力、思维灵活性和解决问题的能力。四年级下册的简便运算主要围绕加法、减法、乘法和除法的运算定律及性质展开。掌握好这些方法，能让复杂的计算变得轻松起来。下面，我们就系统地整理了300道简便运算练习题，希望同学们能通过反复练习，熟练运用各种简便方法，真正做到算得又快又对。二、加法简便运算（一）加法交换律与结合律基础练习（加法交换律：a+b=b+a；加法结合律：(a+b)+c=a+(b+c)）1.28+56+722.45+37+553.126+78+744.35+63+375.89+101+116.52+147+487.66+25+348.138+62+859.91+85+910.203+59+9711.75+168+2512.34+156+6613.145+208+5514.68+21+3215.111+34+8916.43+157+6917.28+172+8918.15+85+7619.98+24+220.306+197+94（二）加法运算律进阶练习（含凑整技巧）1.99+1242.198+353.201+874.347+1025.56+986.78+2037.154+2998.405+1289.89+19610.302+56711.145+9712.256+10113.79+20414.453+9815.67+19916.105+23817.298+30518.156+20219.349+10320.97+254三、减法简便运算（一）一个数连续减去两个数的简便运算（a-b-c=a-(b+c)或a-b-c=a-c-b）1.180-75-252.200-56-443.345-67-334.468-124-765.520-138-626.175-36-647.234-58-428.360-182-189.470-254-4610.586-178-2211.168-49-5112.215-86-1413.300-153-4714.412-93-10715.535-126-7416.190-65-3517.276-88-1218.384-119-8119.495-147-5320.560-237-63（二）一个数减去两个数的和的简便运算（a-(b+c)=a-b-c）1.280-(80+95)2.360-(60+140)3.450-(150+67)4.520-(220+180)5.178-(78+45)6.245-(45+86)7.321-(121+59)8.400-(150+250)9.512-(112+75)10.169-(69+34)11.290-(90+120)12.375-(75+136)13.430-(130+170)14.500-(200+150)15.186-(86+57)16.258-(58+99)17.333-(133+67)18.467-(167+100)19.542-(242+89)20.195-(95+48)（三）利用凑整进行减法简便运算（a-b=a-c+d当b=c-d时，或a-b=a+d-c当b=c+d时）1.165-972.230-1023.347-984.451-2035.526-1996.178-1057.204-968.310-2019.405-19710.562-29811.183-9912.240-10413.355-19814.420-20515.578-29916.190-8817.267-10318.380-19719.496-20220.530-298四、乘法简便运算（一）乘法交换律与结合律基础练习（乘法交换律：a×b=b×a；乘法结合律：(a×b)×c=a×(b×c)）1.25×17×42.125×23×83.5×28×204.4×36×255.8×45×1256.15×25×4×27.25×8×4×1258.50×13×29.125×32×2510.25×1611.125×2412.5×18×213.4×25×914.8×125×715.25×40×316.125×80×517.3×25×4×718.12×2519.16×12520.25×36（二）乘法分配律基础练习（(a+b)×c=a×c+b×c）1.(20+4)×252.(80+8)×1253.(100+5)×364.(200+7)×155.(40+8)×506.12×(100+5)7.25×(40+4)8.125×(80+8)9.30×(200+3)10.50×(10+2)11.(15+25)×412.(25+12)×813.(30+5)×2014.(12+18)×515.(7+4)×2516.6×(10+50)17.8×(25+125)18.15×(40+8)19.20×(50+3)20.25×(8+12)（三）乘法分配律逆运算（提取公因数）（a×c+b×c=(a+b)×c）1.35×7+35×32.64×4+64×63.125×8+125×24.25×9+25×15.101×87-876.56×11+56×897.78×36+22×368.45×102-45×29.13×25+13×7510.9×37+9×6311.63×46+54×6312.18×72+28×1813.23×15+23×8514.47×30+47×7015.105×26-5×2616.38×12+38×8817.59×43+57×5918.76×21+24×2119.29×56+44×2920.100×45-45×1（四）乘法分配律进阶练习（含接近整十、整百数的乘法）1.102×352.99×263.101×894.98×475.201×506.99×125×87.102×25×48.98×309.103×4210.97×1511.101×101-10112.99×99+9913.25×9814.125×10415.56×10216.78×9917.34×10118.45×98+9019.25×4120.125×79+125五、除法简便运算（一）一个数连续除以两个数的简便运算（a÷b÷c=a÷(b×c)或a÷b÷c=a÷c÷b）1.360÷8÷52.480÷5÷123.540÷2÷274.600÷25÷45.720÷12÷66.800÷16÷57.900÷3÷308.1000÷125÷89.240÷4÷610.350÷7÷511.420÷3÷712.560÷8÷713.630÷9÷714.700÷2÷3515.810÷5÷1816.960÷16÷617.1200÷25÷4818.1500÷3÷5019.1800÷4÷4520.2000÷8÷25（二）利用商不变的性质进行简便运算（a÷b=(a×c)÷(b×c)或a÷b=(a÷c)÷(b÷c)，b、c不为0）1.200÷252.300÷1253.400÷504.150÷255.240÷56.360÷457.480÷328.540÷189.630÷4210.720÷1511.180÷1512.280÷3513.350÷2514.420÷2815.500÷12516.600÷1517.700÷2518.800÷