五年级小数除法脱式计算练习题

第三单元小数除法（脱式/简便计算）学校:__________姓名：___________班级：___________考号：___________一、脱式计算1．计算。

（5.6×2.7×0.48×7.4）÷（0.12×37×0.28×9）2．计算下面各题，能简算的要简算。

29.3÷1.25÷8 18.72×9÷1.8 7.6×1013．计算下面各题，你认为怎样简便就怎样算。

4．脱式计算。

1.2÷（3.9＋8.1） 10.5÷25×4 8.6×8.3＋8.6×1.75．脱式计算13.25-5.7-2.7 46×3-306÷5.16．怎样简便就怎样算。

①3.2×0.7＋5.1÷1.7 ②99×0.62＋0.62③2.4×2.5×44 ④（2.1＋6.9÷0.15）÷0.257．脱式计算（能简算的要简算）。

①2.34×101－2.34 ②3.12×0.25×40③54×0.5＋12.3÷0.3 ④72.5÷2.5÷450.75 1.5 6.4-÷⨯ 1.250.780.9⨯⨯⨯15.47.37.3 5.4⨯-⨯0.7898⨯8．脱式计算，能简便计算的可以简算。

15.6＋4.4×2.5（4.58－2.6）÷0.920.21×101－20.219．计算下面各题，怎样简便就怎样算。

20.28÷1.69÷6049.2－0.5×0.5－8.750.86×15.7－0.86×14.7 3.5÷0.6－0.5÷0.610．计算下面各题，能简算的要简算。

小学五年级数学小数除法练习题脱式计算题7.28×99+7.284.3×50×0.64－2.64×0.×0.283.94+34.3×0.28.9×1.1×4.732＋4.9－0.94.8×100.112.5×0.4×2.5×82.7×5.4×3.6.58×4.5×0.9×810.8－0.8×7.0 0.87×3.16+4.641.2×÷4.8.6×9.85-5.466.5×99＋56.54.8+ 0.3÷ 1.0.6÷× 1.258.05×3.4+7.6.8×0.5+1.584.8－4.8×0..5×10117.-.×..09×8.×40.÷ 0.81 × 0.184.× .13.×0.×826.81+6.81×990.25×185×40.4×0.8－3.4×0. ×．．2.×1.25＋4.2×1.752.37×6.3+2.37×3.70.25×39+0.25×1.256.8×0.75÷0.513.5×0.982.5×1.25×0.3 0.125×7299.75÷0.125–2.7 12.5×8..8×10.1×0.33+54×0.30.25×185×407.2.5×.69×1013.8×10.1 .5×9.81+6.81× 1.53+23.4÷五年级数学上册《小数除法竖式计算题》练习姓名：___________ 分数：__________ 练习日期：_________25.2÷6=.÷1.5=5.6÷0.04=1.8÷12=1.8÷1.2= .83÷9=4.08÷0.8=0.54÷0.6=6.3÷0.14=72÷15=14.21÷7=4÷1.5=1.26÷18=43.5÷29= 18.9÷0.27= 1.35÷15=28.6÷11=20.4÷24=3.64÷52= 156÷0.12=328÷1.6= 1.35÷27=.65÷0.85= 12.6÷0.28=62.4÷2.6=54.4÷0.16=1.44÷1.8= 11.7÷2.6=19.4÷12=.8÷0.23= 19.76÷5.2=10.8÷45=21÷1.4= .84÷1.7=2.1÷0.03= 1.89÷54=0.51÷2.2=.1÷2.5= 1.998÷0.54= 1.28÷16=2.1÷0.4= ÷32=÷38.6=4.68÷75=14.7÷0.07= ÷15=÷0.24= 3.4÷585=0.544÷0.025=203.5÷11=÷15= .64÷52=25.2÷6=34.÷1.5=5.6÷0.04= 1.8÷12=4.08÷0.8= 14.21÷7= .83÷9=0.54÷0.6= ÷24÷1.5=1.26÷43.5÷29= ÷15= 18.9÷0.27=3.64÷.65÷0.85= ÷11=812.6÷0.12=÷2.6= 1.44÷1.8=÷12=59.8÷0.23= ÷45= ÷5.2=21÷1.4=.84÷1.7=0.03=0.51÷2.2= .1÷2.5= ÷16=÷0.03=1.998÷0.54= 0.18÷38.6= 124.8÷ .1÷0.4=2.56÷32=4.68÷75= 14.7÷5.4÷15=203.5÷11= 113.5÷ ÷ 23.5÷16=39.4÷12=4.8÷0.23= 14.76÷5.1=25÷1.4=8.89÷1.7= 1.863.1÷0.09=0.53÷2.3= .8÷2.5=1.28÷6.4÷0.02=0.998÷0.55= 0.17÷38.6= 124.8÷2.5÷0.3=8.56÷35=.78÷74=14.7÷0.06=5.5÷16=脱式计算0.396÷1.2= 0.756÷0.36=15.6×13= .76×3＝0.18×15=0.025×14= .06×36=0.04×0.12＝3.84×2.6≈7.15×20.75÷3..68×0.2516.9÷0.11.55÷3..7×0.01613.76×0.8=5.2×0.6.4×1.36.4×0.54.48×0.4.25×535.4×4.0.042×0.540.76×0.320.25×0.0462.52×3.1.08×250.12×0.5×0.16＝.8×0.25＝0.125×1.4≈2.5÷0.7= 10.1÷3.3=10.75÷12.5=3.25×9.04=3、脱式计算2.5×7.1×16.12×99＋16.1.2×0.9＋0..28×99+7.28.3×50×0.264－2.64×0.526×15.7＋15.7×2×0.283.94+34.3×0.1.2×÷4..9×1.1×4..7×5.4×3.93.6×9.85-5.468.05×3.4+7.6.58×4.5×0..8×0.5+1.582＋4.9－0..8－4.8×0. ×.8×100.1.5×99＋56..09×10.8－0.8×7.0.8+ 0.3÷ 1..× 17.-.×.412.5×0.4×2.5×80.87×3.16+4.6.5×1010.6÷× 1.240.÷ 0.81 × 0.18.×2.13×0×82576.81+6.81×990.25×185×40 .4×0.8－3.4×0.8×．54．2.×1.＋1.×1.752.37×6.3+2.37×3..5×1.25×0.32.8×10.12.5× .69×101 .8×10.10.25×39+0.0.125×76×0.33+54×0.33×1.259 185×406.8×0.75÷0.0.125–2.75.29.5×9 0.98.8小数除法测试题1列竖式计算小数除以整数时，1、按整数除法的方法去除，商的小数点要和被除数的小数点对齐。

五年级小数除法脱式计算练习题7.28 ×99+7.284.3 ×50×0.64 －2.64 ×0. ×0.283.94+34.3 ×0.28.9 × 1.1 × 4.732 ＋4.9 －0.94.8 ×100.112.5 ×0.4 × 2.5 × 82.7 × 5.4 ×3.6.58 ×4.5 ×0.9 ×810.8 －0.8 ×7.0 0.87 × 3.16+4.641.2 ×÷ 4.8.6 ×9.85 -5.466.5 ×99 ＋56.54.8+ 0.3 ÷ 1.0.6 ÷×1.258.05 × 3.4+7.6.8 ×0.5+1.584.8 －4.8 ×0..5 ×10117. - . ×..09 ×8. ×40. ÷0.81 ×0.184. ×.13. ×0. ×826.81+6.81 ×990.25 ×185×40.4 ×0.8 －3.4 ×0. ×．．2. × 1.25 ＋4.2 × 1.752.37 × 6.3+2.37 ×3.70.25 ×39+0.25× 1.256.8 ×0.75 ÷0.513.5 ×0.982. 5× 1.25 ×0.3 0.125×7299.75÷0.125– 2.7 12.5 ×8..8 ×10.1 ×0.33+54×0.30.25 ×185×407.2.5 ×.69 ×1013.8×10.1 .5 ×9.81+6.81 × 1.53+23.4 ÷5.3 ×6.3+2.3=.4 ×7.3+5.3=9.2+9 × 3.9=4×8.8+1.5=4.1 ×0.8 - 0.2=8.8+0.6 ×0.1=.9 × 1.4+0.6=.4× 2.4+3.6=12.48- 0.4 ×9.7= .8 × 1.3 - 0.3= .9 × 5.2+9.3= .8+3.1 × 9 .1=.8 ×9.1 - 0.5=.2 × 1.8 -0.1=.59- 0.3 × 4.3=3.053 - 0.1 ×5.3= .4 ×8.4+5.8=.908 - 1.3 × 1.6= .248 -13.596- 0.9 × 5. 6= .3+3.8 × 2.3=.7 ×0.1 -0.1= 1.7+0.3 ×7.6=.58 -.39- 1.1 × 4.9=0.3+2.8 × 3.5= .9 ×8.2+9.2=.32.9+0.6 ×7.5=.6 × 6.5+6.4=0.2 × 5.6+2.5= 1.6 × 5-0.5=0.5 × 4.6+7.1=.6 ×0.38= .1 ×0.7=1.8 ×9.6 - 1.7=.6 ×8.9+8=.1 ×0.4=9.8 × 4.3+9.6= × 1.1 -0 .2= × 4.5+3.2=1.3 ×2.2 - 0.2= 0.9+8.3 ×8.3=3×7.6=.3 ×8.5= 0.4 × 1.9= 0.8 ×0.5=.5 × 5.7+5.8=.3+6.1 × 4.8=1.7 × 4.7=8.7+3.4 ×9=7.7×9.9+7.7=.9 × 1.7+0.5=9.08 -0 . .9+.576- 1.5-11.25-8.99-小数除法测试题1算小数除以整数时，1、按整数除法的方法去列竖式计除，商的小数点要和被除数。

专题01 小数除法（脱式计算）答案解析一．计算题（共25小题）1．用你喜欢的方法计算。

1.750.254÷× 1.2549 1.25×+ (67.244.5)0.4−÷【分析】1.75÷0.25×4，先计算除法，再计算乘法；1.25×49＋1.25，根据乘法分配律，原式化为：1.25×（49＋1），再进行计算；（67.2－44.5）÷0.4，先计算括号里的减法，再计算括号外的除法。

【解答】1.75÷0.25×4＝7×4＝281.25×49＋1.25＝1.25×（49＋1）＝1.25×50＝62.5（67.2－44.5）÷4＝22.7÷4＝5.6752．计算下面各题，能简算的要简算。

（1）36÷0.4－1.2×5 （2）3.8÷1.25÷0.8（3）0.56×7.3－0.56×6.3 （4）（5.3－1.7）÷0.09【分析】（1）先同时计算除法和乘法，再算减法；（2）根据除法的性质简算；（3）运用乘法分配律简算；（4）先算减法，再算除法。

【解答】（1）36÷0.4－1.2×5＝90－6＝84（2）3.8÷1.25÷0.8＝3.8÷（1.25×0.8）＝3.8÷1＝3.8（3）0.56×7.3－0.56×6.3＝0.56×（7.3－6.3）＝0.56×1＝0.56（4）（5.3－1.7）÷0.09＝3.6÷0.09＝403．认真算一算，能简算的要简算。

37.6－7.6÷0.5 0.78÷0.25÷4 40×[（1.12＋1.2）÷0.2]【分析】（1）先算除法，再算减法；（2）根据除法的性质简算；（3）先算加法，再算除法，最后算乘法。

小学五年级数学小数除法练习题及答案一、脱式运算213.6÷0.8÷0.3 36.6÷5×1.740.5÷0.5+10.75 18.305÷0.07-85.16二、简便运算（一）3.6×2.5+7.5×3.6 3.8×1.1 0.125×32 6.5×1020.125×72 3.25×99+3.25930÷5÷0.6 4.53÷0.25÷4（二）列式计算（1）21除214.2的商，乘0.7，积是多少？（2）18.305除以0.7的商，减去25.46，差是多少？（3）12.5的0.32倍是多少（4）7.5减去1.5的差去除8.1加上4.5的和，商是多少？三、解决问题1.李大妈带了100元买了25斤大米，找回了30元，每斤大米多少元？2、长夏小学501班44人15天共节约纸张12千克，平均每人每天节约多少千克纸张？3.今年改革电价后，如果小红家每个月节约了25度电，全年节约228元电费，算一算电费一度多少元？4. 3台同样的抽水机，4小时可以浇地2.4公顷。

1台抽水机每小时可以浇地多少公顷？5、做一个水桶需要铁皮3.4平方米，26.2平方米铁皮能做几个水桶？6、一个笼子放4只鸽子，70只鸽子需要多少个笼子？7、每套衣服用布2.2米，100米布可以做多少套衣服？8、农具厂赶制540农具支援灾区，前10天每天制造32件，余下的要在5天内完成，平均每天要加工多少件?9、一个纺织厂，平均1000个纱锭可生产棉纱26.5千克。

如果1千克棉纱可以织布7.2米，那么织布4770米，需要多少个纱锭？一、脱式运算213.6÷0.8÷0.3 36.6÷5×1.7=267÷0.3 =7.32÷1.7=890 =12.44440.5÷0.5+10.75 18.305÷0.07-85.16=81+10.75 =216.5-85.16=91.75 =176.34二、简便运算（一）3.6×2.5+7.5×3.6 3.8×1.1=3.6×（2.5+7.5） =3.8×（1+0.1）=3.6×10 =3.8×1+3.8×0.1=36 =3.8+0.38=4.180.125×32 6.5×102=0.125×（8×4） = 6.5×（100+2）=0.125×8×4 =6.5×100+6.5×2=1×4 =650+13=4 =6630.125×72 3.25×99+3.25=0.125×（8×9） =3.25×（99+1）=0.125×8×9 =3.25×100=9 =325930÷5÷0.6 4.53÷0.25÷4==930÷（5×0.6） =4.53÷（0.25×4）=930÷30 =4.53÷1=310 =4.53（二）列式计算（1）21除214.2的商，乘0.7，积是多少？214.2÷21×0.7=10.2×0.7=7.14（2）18.305除以0.7的商，减去25.46，差是多少？18.305÷0.7-25.46=26.15-25.46=0.69（3）12.5的0.32倍是多少12.5×0.32=4（4）7.5减去1.5的差去除8.1加上4.5的和，商是多少？（8.1+4.5）÷（7.5-1.5）=12.6÷6=2.1。

五年级小数除法脱式计算练习题7.28×99+7.284.3×50×0.64－2.64×0.×0.283.94+34.3×0.28.9×1.1×4.732＋4.9－0.94.8×100.112.5×0.4×2.5×82.7×5.4×3.6.58×4.5×0.9×810.8－0.8×7.0 0.87×3.16+4.641.2×÷4.8.6×9.85-5.466.5×99＋56.54.8+ 0.3÷ 1.0.6÷× 1.258.05×3.4+7.6.8×0.5+1.584.8－4.8×0..5×10117.-.×..09×8.×40.÷ 0.81 × 0.184.× .13.×0.×826.81+6.81×99 0.25×185×40.4×0.8－3.4×0. ×．．2.×1.25＋4.2×1.752.37×6.3+2.37×3.70.25×39+0.25×1.256.8×0.75÷0.513.5×0.982.5×1.25×0.3 0.125×7299.75÷0.125–2.7 12.5×8..8×10.1×0.33+54×0.30.25×185×407.2.5×.69×1013.8×10.1 .5×9.81+6.81× 1.53+23.4÷5.3×6.3+2.3=.4×7.3+5.3=9.2+9×3.9=4×8.8+1.5=4.1×0.8-0.2=8.8+0.6×0.1=.9×1.4+0.6=.4×2.4+3.6=12.48-0.4×9.7= .8×1.3-0.3= .9×5.2+9.3= .8+3.1×9 .1=.8×9.1-0.5=.2×1.8-0.1=.59-0.3×4.3=3.053-0.1×5.3= .4×8.4+5.8=.908-1.3×1.6= .248-13.596-0.9×5. 6= .3+3.8×2.3=.7×0.1-0.1= 1.7+0.3×7.6=.58-.39-1.1×4.9=0.3+2.8×3.5= .9×8.2+9.2=.32.9+0.6×7.5=.6×6.5+6.4=0.2×5.6+2.5= 1.6×5-0.5=0.5×4.6+7.1=.6×0.38= .1×0.7=1.8×9.6-1.7=.6×8.9+8=.1×0.4=9.8×4.3+9.6=×1.1-0.2= ×4.5+3.2=1.3×2.2-0.2= 0.9+8.3×8.3=3×7.6=.3×8.5= 0.4×1.9= 0.8×0.5=.5×5.7+5.8=.3+6.1×4.8=1.7×4.7=8.7+3.4×9=7.7×9.9+7.7=.9×1.7+0.5=9.08-0. .9+.576- 1.5-11.25-8.99-小数除法测试题1列竖式计算小数除以整数时，1、按整数除法的方法去除，商的小数点要和被除数的小数点对齐。

小数除法脱式运算+简算300道一．计算题（共50小题）1．用递等式进行计算，能简便的要简便简便计算．7.29×4.6+46×1.271 （28.7﹣18.6÷3.1）×0.8 16﹣5.32﹣4.68 3.7×0.125+6.3÷8 40.8+14.7÷（14.6﹣12.5）0.72+9.6÷3.22．用简便方法计算．3.7×4.5﹣4.4×3.70.25×0.25×4 3.84﹣1.9+0.16﹣1.19﹣7÷2.5×0.4 5.5×[0.672÷（2+2.2）]3．用递等式计算，能简算的要简算．28.7÷7×4.59.6÷（15.4﹣12.2）4.6×1.2+2.8×4.693÷3.1÷0.34．计算下列各题（能用简便算法的要用简便算法）．（4.15+0.65）×0.9 9.06×14.7+5.3×9.06（2.3+1.05÷2.1）×2.5 9.18÷[（5.9﹣2.3）×0.25]．5．选择合理的方法进行计算，并写出计算主要过程．12.5×0.5×8 17.5÷（5.7﹣3.2）48.77﹣32.76÷8.410.25÷2.5÷0.4 18.1﹣2.8×4.6 3.01×101﹣30.1×0.1．6．脱式计算，能简算的要简算．4.8÷2.04÷2.4 1.1÷（22÷5）25÷40×0.472+0.9÷0.125 17.37÷0.45﹣3.86÷0.1 9.07﹣22.78÷3.4+3.7．7．用递等式计算，能简算的要简算．10.01×101﹣10.01 0.11×1.8+8.2×0.1126×20.2﹣8.4﹣1.8 12.05÷1.25÷0.8．8．递等式计算（能简算的要简算）6.5×99 4.65﹣2.55﹣1.45 2.2×0.25+2.8×0.25 0.25×6.82×4．9．计算下面各题，能简算的要简算．102×4.5 8×（20﹣1.25）8.3+8.3×99 （1.25+12.5+125）×8．10．计算（能简算要简算）2.64+8.67+7.36+11.33 2.74×9.5+0.5×2.7（2400﹣480×2.5）÷1.616.8×10.1 1.25×88 6.87×[40÷（3.49﹣3.09）]．11．脱式计算（能简简的要简算）2.8+0.2﹣2.8+0.2 37÷12.5÷0.8 1.25×（10+0.8）10.8﹣3.8×0.4÷0.76 0.36÷[（6.1﹣4.6）×0.8]．12．计算下面各题，能简算的要简算．4.05÷0.9+5.5 3.67×10.1﹣3.67×0.199×0.73+0.73 3.3+6.7×3.5．13．怎样简便怎样算3.7÷2.5÷0.40.25×1.25×329.83×1.5+0.617×15．14．计算下面各题．（能简算的要简算）12.13+7.5﹣12.13 7.69﹣（3.7+2.69）7.8×1.019.4×3.2+6×0.32 12.5×3.2 13.8÷（1.38×2）15．下面各题，怎样简便就怎样算432.5÷25÷0.4 1.25×3.2×2.5 0.81×99+0.815.9×10.1 100﹣52.8﹣47.2（4﹣0.4）×0.25．16．计算下面各题，能简算的要简算．0.75×18÷0.15 9.3÷0.125÷8 1.78×99+1.784.7×4.28+5.3×4.28 2.3×10.2 21.36÷0.2﹣25.9．17．怎样简便就怎样计算28.4×99+28.4 3.6×2010.94×2.5﹣0.454×0.8×12.5×2.517.5÷0.25×17+1315.58÷8.2﹣0.72．18．计算，能简算的要简算．1.25×2.5×0.8×43=10÷0.2÷2.5=8.4÷0.21÷0.5=64×4.5+3.6×45= 1.25×3.2×0.8=14.5×102=19．脱式计算，能简算的要简算．0.34×101 8.8×1.25 2.94×6.3+3.7×2.9421.9﹣9.28﹣10.72 2.7+（11.2﹣2.7）×0.4 1.5×[0.02÷（2.1﹣2.09）]．20．计算下面各题．（能简算的要简算）10.7﹣22.78÷3.4 5.5×17.3+6.7×5.5 3.76÷0.4÷2.5 0.25×12.5×3.2．21．递等式计算，能简便计算的要简便计算．4.6×25 3.75÷12.5÷0.8 2.5+7.5÷4（3.2﹣1.4）÷0.18﹣1.87.9×7.1+2.9×7.9（30.2﹣4.6×5）÷0.12．22．下面各题，怎样简便就怎样计算．0.75×0.5×0.8 5.6×15.7+9.3×5.6 50.4×1.9﹣1.8．23．计算下面各题，注意运用简便方法．2.4﹣0.2÷5×60 0.25×6.8×405.52﹣0.55﹣0.45 0.49×7.2﹣7.2×0.39．24．计算，能简算的要写出简算过程．4×0.8×2.5×12.5 2.25×4.8+77.5×0.48．25．计算下面各题，能简算的要简算．13.73+6.27÷0.318÷0.4÷2.5 0.75×99+0.752.85×5.35+2.85×4.65 1.5×0.4÷1.5×0.4．26．怎样简便就怎样计算28.4×99+28.4 3.6×201 0.94×2.5﹣0.454×0.8×12.5×2.5 17.5÷0.25×17+13 1.25×8.08．27．下面各题，怎样算简便就怎样算．2.45﹣（1.45+0.89） 1.25×1.7×0.8 5.3×0.82﹣0.82×0.33.6÷[12×（0.53﹣0.45）]．28．计算下面各题，能简算的要简算．125×32×2.5 2.6×（3.4+1.6） 6.7×5.5+5.5×3.3．36×999.07﹣2.2﹣7.817.6÷4÷2.529．计算下面各题，能简算的要简算．2.5×0.27×4 0.63×101 0.78+0.22÷53.7×12.5+4.3×12.5 （0.36+5.4）÷0.6 4.5÷0.25÷1.6．30．脱式计算（能简便的用简便计算）．1.6×（2.25+10.5÷1.5）74×57+43×740.6÷[（6.1﹣4.6）×0.8]101×92﹣92125×64 46.2×0.56+5.37×5.6+1×0.05631．脱式计算（能简算的就简算）1.5×102 1.25×213×0.8 72×0.81﹢10.41.25×5.6 6.05÷0.5+10.75 29.6÷0.8﹣1.2×5．32．脱式计算下列各题，能简算的要简算．2.69×99+2.69 1.25×2.3×0.83.17×5.6+4.4×3.1738÷0.25÷0.4 6.5÷0.125 0.225÷0.25×433．脱式计算（能简算的要简算）．17.54+28.35+3.46+1.55 32.36﹣13.43﹣（7.57+1.36）7.2×2.745÷0.363.85×5.6+5.4×3.85﹣3.85 （3.2+0.128）÷0.8 （13.3﹣8.8）×3.2÷0.36．34．脱式计算（能简算的要简算）0.75×4×0.25×4 6.3×10.115.58÷8.2﹣0.72 4.536÷0.8÷14．35．脱式计算，能简算的要简算．7.5×2+1.25÷0.598×7.580÷0.25+0.75 19×3.8+3.8 1.25×3.4×0.8 5.12÷0.4÷2.536．计算，能简算的要简算55.04+12.8﹣3.30.25×32×0.1257.8×75+75×0.2．37．用你喜欢的方法计算．0.21×14÷0.50.25×13×4 1.25×9.7﹣1.25×1.716.5÷[（5.2+4.8）×1.5]（8.92﹣0.45）÷（2.5+4.5）38．下面各题怎样算简便就怎样算．6.8×0.46+0.54 5.4×2.3+5.4×7.70.25×32×12.5 75÷1.25÷8．39．用递等式计算，（有★用简算）7.8﹣7.2+0.9 0.38+0.26+3.4 （125﹣45）×313+[（41+22）÷9]★6.7+2.5+3.3★13×25×4．40．脱式计算，能简算的要简算12.8+2.04×9.50.15×1999+0.150.76×6.5﹣0.76×5.578÷0.25÷0.4．41．计算下面各题，怎样简便就怎样计算．4.05÷0.5+10.75 6.8×2.7+2.7×3.2 6.8×0.75÷0.570.3﹣17.48÷7.6 8.5×1.2÷3.4 13.75÷0.125﹣2.7．42．计算下面各题，能用简便方法计算的要用简便方法．0.75×18÷0.15 6.15÷0.125÷0.8 4.55÷0.28﹣0.471.7×2.5×0.08 1.89×11﹣1.893.6×0.35+6.4×0.3543．计算下面各题，能简算的要简算．3.4+6.6÷0.3 25×1.25×0.04×0.899×0.73+7.3×0.1 96.5÷1.25÷0.8．44．脱式计算（能简算的用简算方法）82.4﹣12.4×5 18.5﹣3.21﹣4.79 8.4+3.8+1.6+6.20.25×17.3×0.4 7.2×（10+0.1） 3.54×0.29﹣0.29×2.5445．计算下列各题，怎么简便就怎么算．0.125×32 8.8÷0.25÷4 56.5×99+56.50.78×1019.9﹣2.07÷2.312.75÷[14.6﹣（1.3+8.2）]．46．计算，能简算的要简算．60.8﹣36÷3.6 12.5×7.2×0.899×78.5+78.5 24.6﹣8.9﹣1.10.9+9.9+99.9+999.9 695÷25÷4．47．脱式计算（能简算的要简算）5.8+6.3÷9×0.5 1.25×0.8÷1.25×0.8 1.92÷0.12﹣2.72.65×1.7+1.35×1.7﹣1.7138÷0.25÷4 1.25×2.5×3.248．你能想出简便方法来计算下面各题吗？25×5+74×5+5 6.74+12.62+24.38+3.2687﹣2.123﹣0.877 30.65﹣（7.65+5.4）（40+8）×125 32×38+32×62．49．脱式计算．（能简算的要简算）65×102 8.23﹣（2.67+3.23）32×16+14×32 8.46+7.26+1.51+2.84 27×[（263+37）÷50]125×32×25．50．递等式计算（能简算的要简算）5.6×0.25 0.32×0.25×12.56.4÷（0.3×2+0.2）201×6.5﹣6.5 102×4.5 2.2×0.25+2.8×0.25．小数除法脱式运算+简算300道参考答案与试题解析一．计算题（共50小题）1．【解答】解：①7.29×4.6+46×1.271 =7.29×4.6+4.6×12.71=（7.29+12.71）×4.6=20×4.6=92；②（28.7﹣18.6÷3.1）×0.8 =（28.7﹣6）×0.8=22.7×0.8=18.16；③16﹣5.32﹣4.68=16﹣（5.32+4.68）=16﹣10=6；④3.7×0.125+6.3÷8 =3.7×+6.3×=（3.7+6.3）×=10×=；⑤40.8+14.7÷（14.6﹣12.5）=40.8+14.7÷2.1=40.8+7=47.8；⑥0.72+9.6÷3.2=0.72+3=3.72．2．【解答】解：（1）3.7×4.5﹣4.4×3.7=3.7×（4.5﹣4.4）=3.7×0.1=0.37；（2）0.25×0.25×4=0.25×（0.25×4）=0.25×1=0.25；（3）3.84﹣1.9+0.16﹣1.1=（3.84+0.16）﹣（1.9+1.1）=4﹣3=1；（4）9﹣7÷2.5×0.4=9﹣2.8×0.4=9﹣1.12=7.88；（5）5.5×[0.672÷（2+2.2）]=5.5×[0.672÷4.2]=5.5×0.16=0.88．3．【解答】解：（1）28.7÷7×4.5=4.1×4.5=18.45（2）9.6÷（15.4﹣12.2）=9.6÷3.2=3（3）4.6×1.2+2.8×4.6=4.6×（1.2+2.8）=4.6×4=18.4（4）93÷3.1÷0.3=30÷0.3=1004．【解答】解：（1）（4.15+0.65）×0.9=4.8×0.9=4.32；（2）9.06×14.7+5.3×9.06=9.06×（14.7+5.3）=9.06×20=181.2；（3）（2.3+1.05÷2.1）×2.5=（2.3+0.5）×2.5=2.8×2.5=7；（4）9.18÷[（5.9﹣2.3）×0.25]=9.18÷[3.6×0.25]=9.18÷0.9=10.2．5．【解答】解：（1）12.5×0.5×8=12.5×8×0.5=100×0.5=50；（2）17.5÷（5.7﹣3.2）=17.5÷2.5=7；（3）48.77﹣32.76÷8.4=48.77﹣3.9=44.87；（4）10.25÷2.5÷0.4=10.25÷（2.5×0.4）=10.25÷1=10.25；（5）18.1﹣2.8×4.6=18.1﹣12.88=5.22；（6）3.01×101﹣30.1×0.1=3.01×（101﹣1）=30.1×100=30100．6．【解答】解：（1）4.8÷2.04÷2.4=4.8÷2.4÷2.04=2÷2.04=（2）1.1÷（22÷5）=1.1÷22×5=0.05×5=0.25（3）25÷40×0.4=25×0.4÷40=10÷40=0.25（4）72+0.9÷0.125=72+7.2=79.2（5）17.37÷0.45﹣3.86÷0.1=38.6﹣38.6=0（6）9.07﹣22.78÷3.4+3.7=9.07﹣6.7+3.7=2.37+3.7=6.077．【解答】解：（1）10.01×101﹣10.01=10.01×（101﹣1）=10.01×100=1001（2）0.11×1.8+8.2×0.11=0.11×（1.8+8.2）=0.11×10=1.1（3）26×20.2﹣8.4﹣1.8=525.2﹣（8.4+1.8）=525.2﹣10.2=515（4）12.05÷1.25÷0.8=12.05÷（1.25×0.8）=12.05÷1=12.058．【解答】解：①6.5×99=6.5×（100﹣1）=6.5×100﹣6.5=650﹣6.5=643.5②4.65﹣2.55﹣1.45=4.65﹣（2.55+1.45）=4.65﹣4=0.65③2.2×0.25+2.8×0.25=（2.2+2.8）×0.25=5×0.25=1.25④0.25×6.82×4=（0.25×4）×6.82=1×6.82=6.829．【解答】解：①102×4.5=（100+2）×4.5=100×4.5+2×4.5=450+9=459②8×（20﹣1.25）=8×20﹣8×1.25=160﹣10=150③8.3+8.3×99 =8.3×（1+99）=8.3×100=830④（1.25+12.5+125）×8=1.25×8+12.5×8+125×8=10+100+1000=110+1000=111010．【解答】解：①2.64+8.67+7.36+11.33=（2.64+7.36）+（8.67+11.33）=10+20=30②2.74×9.5+0.5×2.7=26.03+1.35=27.38③（2400﹣480×2.5）÷1.6=（2400﹣1200）÷1.6=1200÷1.6=750④16.8×10.1=16.8×（10+0.1）=16.8×10+16.8×0.1=168+1.68=169.68⑤1.25×88=1.25×（80+8）=1.25×80+1.25×8=100+10=110⑥6.87×[40÷（3.49﹣3.09）]=6.87×[40÷0.4]=6.87×100=68711．【解答】解：（1）2.8+0.2﹣2.8+0.2=（2.8﹣2.8）+（0.2+0.2）=0+0.4=0.4（2）37÷12.5÷0.8=37÷（12.5×0.8）=37÷10=3.7（3）1.25×（10+0.8）=1.25×10+1.25×0.8=12.5+1=13.5（4）10.8﹣3.8×0.4÷0.76=10.8﹣1.52÷0.76=10.8﹣2=8.8（5）0.36÷[（6.1﹣4.6）×0.8]=0.36÷[1.5×0.8]=0.36÷1.2=0.3 12．【解答】解：（1）4.05÷0.9+5.5=4.5+5.5=10（2）3.67×10.1﹣3.67×0.1=3.67×（10.1﹣0.1）=3.67×10=36.7（3）99×0.73+0.73=（99+1）×0.73=100×0.73=73（4）3.3+6.7×3.5=3.3+23.45=26.7513．【解答】解：①3.7÷2.5÷0.4=3.7÷（2.5×0.4）=3.7÷1=3.7②0.25×1.25×32=0.25×1.25×（4×8）=（0.25×4）×（1.25×8）=1×10=10③9.83×1.5+0.617×15=9.83×1.5+6.17×1.5=1.5×（9.83+6.17）=1.5×16=2414．【解答】解：①12.13+7.5﹣12.13=12.13﹣12.13+7.5=0+7.5=7.5 ②7.69﹣（3.7+2.69）=7.69﹣3.7﹣2.69=7.69﹣2.69﹣3.7=5﹣3.7=1.3③7.8×1.01=7.8×（1+0.01）=7.8×1+7.8×0.01=7.8+0.078=7.878④9.4×3.2+6×0.32=9.4×3.2+0.6×3.2=3.2×（9.4+0.6）=3.2×10=32 ⑤12.5×3.2=12.5×（8×0.4）=12.5×8×0.4=100×0.4=40 ⑥13.8÷（1.38×2）=13.8÷1.38÷2=10÷2=515．【解答】解：①432.5÷25÷0.4=432.5÷（25×0.4）=432.5÷10=43.25②1.25×3.2×2.5=1.25×（8×0.4）×2.5=（1.25×8）×（0.4×2.5）=10×1=10③0.81×99+0.81=0.81×（99+1）=0.81×100=81④5.9×10.1 =5.9×（10+0.1）=5.9×10+5.9×0.1=59+0.59=59.59⑤100﹣52.8﹣47.2=100﹣（52.8+47.2）=100﹣100=0⑥（4﹣0.4）×0.25=4×0.25﹣0.4×0.25=1﹣0.1=0.916．【解答】解：（1）0.75×18÷0.15 =0.75÷0.15×18=5×18=90；（2）9.3÷0.125÷8 =9.3÷（0.125×8）=9.3÷1=9.3；（3）1.78×99+1.78=1.78×（99+1）=1.78×100=178；（4）4.7×4.28+5.3×4.28 =（4.7+5.3）×4.28=10×4.28=42.8；（5）2.3×10.2 =2.3×（10+0.2）=2.3×10+2.3×0.2=23+0.46=23.46；（6）21.36÷0.2﹣25.9=106.8﹣25.9=80.9．17．【解答】解：（1）28.4×99+28.4=28.4×（99+1）=28.4×100=2840（2）3.6×201=3.6×（200+1）=3.6×200+3.6×1=720+3.6=723.6（3）0.94×2.5﹣0.45=2.35﹣0.45=1.9（4）4×0.8×12.5×2.5=（4×2.5）×（0.8×12.5）=10×10=100（5）17.5÷0.25×17+13=70×17+13=1190+13=1203（6）15.58÷8.2﹣0.72=1.9﹣0.72=1.1818．【解答】解：（1）1.25×2.5×0.8×43=1.25×0.8×2.5×43=1×2.5×43=107.5；（2）10÷0.2÷2.5=10÷（0.2×2.5）=10÷0.5=20；（3）8.4÷0.21÷0.5=40÷0.5=80；（4）64×4.5+3.6×45=64×4.5+36×4.5=（64+36）×4.5=100×4.5=450；（5）1.25×3.2×0.8=1.25×0.8×3.2=1×3.2=3.2；（6）14.5×102=14.5×（100+2）=14.5×100+14.5×2=1450+29=1479．19．【解答】解：（1）0.34×101=0.34×（100+1）=0.34×100+0.34×1=34+0.34=34.34；（2）8.8×1.25=（1.1×8）×1.25=1.1×（8×1.25）=1.1×10=11；（3）2.94×6.3+3.7×2.94=2.94×（6.3+3.7）=2.94×10=29.4；（4）21.9﹣9.28﹣10.72=21.9﹣（9.28+10.72）=21.9﹣20=1.9；（5）2.7+（11.2﹣2.7）×0.4=2.7+8.5×0.4=2.7+3.4=6.1；（6）1.5×[0.02÷（2.1﹣2.09）]=1.5×[0.02÷0.01]=1.5×2=3．20．【解答】解：①10.7﹣22.78÷3.4 =10.7﹣6.7=4②5.5×17.3+6.7×5.5=5.5×（17.3+6.7）=5.5×24=132③3.76÷0.4÷2.5=3.76÷（0.4×2.5）=3.76÷1=3.76 ④0.25×12.5×3.2=0.25×12.5×（4×0.8）=（0.25×4）×（12.5×0.8）=1×10=1021．【解答】解：（1）4.6×25=（4+0.6）×25=4×25+0.6×25=100+15=115；（2）3.75÷12.5÷0.8=3.75÷（12.5÷0.8）=3.75÷10=0.375；（3）2.5+7.5÷4=2.5+1.875=4.375；（4）（3.2﹣1.4）÷0.18﹣1.8=1.8÷0.18﹣1.8=10﹣1.8=8.2；（5）7.9×7.1+2.9×7.9=7.9×（7.1+2.9）=7.9×10=79；（6）（30.2﹣4.6×5）÷0.12=（30.2﹣23）÷0.12=7.2÷0.12=60．22．【解答】解：（1）0.75×0.5×0.8=0.75×（0.5×0.8）=0.75×0.4=0.3；（2）5.6×15.7+9.3×5.6=5.6×（15.7+9.3）=5.6×25=14×0.4×25=14×（0.4×25）=14×10=140；（3）50.4×1.9﹣1.8=95.76﹣1.8=93.96．23．【解答】解：①2.4﹣0.2÷5×60=2.4﹣0.04×60=2.4﹣2.4=0②0.25×6.8×40=（0.25×40）×6.8=10×6.8=68③5.52﹣0.55﹣0.45=5.52﹣（0.55+0.45）=5.52﹣1=4.52④0.49×7.2﹣7.2×0.39=7.2×（0.49﹣0.39）=7.2×0.1=0.7224．【解答】解：（1）4×0.8×2.5×12.5=（4×2.5）×（0.8×12.5）=10×10=100（2）×14+87×﹣=×（14+87﹣1）=×100=80（3）（+）×42 =×42+×42=35+12=47（4）2.25×4.8+77.5×0.48=2.25×4.8+7.75×4.8=（2.25+7.75）×4.8=10×4.8=48 25．【解答】解：（1）13.73+6.27÷0.3=13.73+20.9=34.63；（2）18÷0.4÷2.5=18÷（0.4×2.5）=18÷1=18；（3）0.75×99+0.75=0.75×（99+1）=0.75×100=75；（4）2.85×5.35+2.85×4.65=2.85×（5.35+4.65）=2.85×10=28.5；（5）1.5×0.4÷1.5×0.4=1.5÷1.5×0.4×0.4=1×0.4×0.4=0.4×0.4=0.16．26．【解答】解：（1）28.4×99+28.4=28.4×（99+1）=28.4×100=2840；（2）3.6×201=3.6×（200+1）=3.6×200+3.6×1=720+3.6=723.6；（3）0.94×2.5﹣0.45=2.35﹣0.45=1.9；（4）4×0.8×12.5×2.5=（4×2.5）×（0.8×12.5）=10×10=100；（5）17.5÷0.25×17+13=70×17+13=1190+13=1203；（6）1.25×8.08=1.25×（8+0.08）=1.25×8+1.25×0.08=10+0.1=10.1．27．【解答】解：①2.45﹣（1.45+0.89）=2.45﹣1.45﹣0.89=1﹣0.89=0.11②1.25×1.7×0.8=1.25×0.8×1.7=1×1.7=1.7③5.3×0.82﹣0.82×0.3=0.82×（5.3﹣0.3）=0.82×5=4.1 ④3.6÷[12×（0.53﹣0.45）]3.6÷12÷（0.53﹣0.45）=0.3÷0.08=3.7528．【解答】解：（1）125×32×2.5=125×（4×8）×2.5=（125×8）×（4×2.5）=1000×10=10000；（2）2.6×（3.4+1.6）=2.6×5=13；（3）6.7×5.5+5.5×3.3=（6.7+3.3）×5.5=10×5.5=55；（4）36×99=36×（100﹣1）=36×100﹣36×1=3600﹣36=3564；（5）9.07﹣2.2﹣7.8=9.07﹣（2.2+7.8）=9.07﹣10=﹣0.93；（6）17.6÷4÷2.5=17.6÷（4×2.5）=17.6÷10=1.76．29．【解答】解：（1）2.5×0.27×4=2.5×4×0.27=10×0.27=2.7；（2）0.63×101=0.36×（100+1）=0.36×100+0.36×1=36+0.36=36.36；（3）0.78+0.22÷5=0.78+0.044=0.824；（4）3.7×12.5+4.3×12.5=（3.7+4.3）×12.5=8×12.5=100；（5）（0.36+5.4）÷0.6=5.76÷0.6=9.6；（6）4.5÷0.25÷1.6=4.5÷（0.25×1.6）=4.5÷0.4=11.25．30．【解答】解：（1）1.6×（2.25+10.5÷1.5）=1.6×（2.25+7）=1.6×9.25=14.8；（2）74×57+43×74=74×（57+43）=74×100=7400；（3）0.6÷[（6.1﹣4.6）×0.8]=0.6÷[1.5×0.8]=0.6÷1.2=0.5；（4）101×92﹣92=（101﹣1）×92=100×92=9200；（5）125×64 =125×8×8=1000×8=8000；（6）46.2×0.56+5.37×5.6+1×0.056=4.62×5.6+5.37×5.6+0.01×5.6=（4.62+5.37+0.01）×5.6=10×5.6=56．31．【解答】解：①1.5×102 =1.5×（100+2）=1.5×100+1.5×2=150+3=153②1.25×213×0.8=1.25×0.8×213=1×213=213 ③72×0.81﹢10.4=58.32+10.4=68.72④1.25×5.6 =1.25×（8×0.7）=1.25×8×0.7=10×0.7=7⑤6.05÷0.5+10.75 =12.1+10.75=22.85⑥29.6÷0.8﹣1.2×5=37﹣6=31 32．【解答】解：（1）2.69×99+2.69=2.69×（99+1）=2.69×100=269（2）1.25×2.3×0.8=1.25×0.8×2.3=1×2.3=2.3（3）3.17×5.6+4.4×3.17=3.17×（5.6+4.4）=3.17×10=31.7（4）38÷0.25÷0.4=38÷（0.25×0.4）=38÷0.1=380（5）6.5÷0.125=6.5÷=6.5×8=52（6）0.225÷0.25×4=0.9×4=3.633．【解答】解：①17.54+28.35+3.46+1.55=17.54+3.46+（28.35+1.55）=21+29.9=50.9 ②32.36﹣13.43﹣（7.57+1.36）=32.36﹣13.43﹣7.57﹣1.36=32.36﹣1.36﹣（13.43+7.57）=31﹣21=1③7.2×2.745÷0.36=7.2÷0.36×2.745=20×2.745=54.9④3.85×5.6+5.4×3.85﹣3.85 =3.85×（5.6+5.4﹣1）=3.85×10=38.5⑤（3.2+0.128）÷0.8 =3.2÷0.8+0.128÷0.8=4+0.16=4.16⑥（13.3﹣8.8）×3.2÷0.36=4.5×3.2÷0.36=14.4÷0.36=4034．【解答】解：①0.75×4×0.25×4=（0.75×4）×（0.25×4）=3×1=3 ②6.3×10.1=6.3×（10+0.1）=6.3×10+6.3×0.1=63+0.63=63.63③15.58÷8.2﹣0.72=1.9﹣0.72=1.18 ④4.536÷0.8÷14=5.67÷14=0.40535．【解答】解：（1）7.5×2+1.25÷0.5=15+2.5=17.5；（2）98×7.5=（100﹣2）×7.5=100×7.5﹣2×7.5=750﹣15=735；（3）80÷0.25+0.75=320+0.75=320.75；（4）19×3.8+3.8=（19+1）×3.8=20×3.8=76；（5）1.25×3.4×0.8=1.25×0.8×3.4=1×3.4=3.4；（6）5.12÷0.4÷2.5=5.12÷（0.4×2.5）=5.12÷1=5.12．36．【解答】解：（1）55.04+12.8﹣3.3=67.84﹣3.3=64.54；（2）0.25×32×0.125=0.25×（4×8）×0.125=（0.25×4）×（8×0.125）=1×1=1；（3）7.8×75+75×0.2=（7.8+0.2）×75=8×75=600．37．【解答】解：（1）0.21×14÷0.5=2.94÷0.5=5.88；（2）0.25×13×4=0.25×4×13=1×13=13；（3）1.25×9.7﹣1.25×1.7=1.25×（9.7﹣1.7）=1.25×8=10；（4）16.5÷[（5.2+4.8）×1.5]=16.5÷[10×1.5]=16.5÷15=1.1；（5）（8.92﹣0.45）÷（2.5+4.5）=8.47÷7=1.21．38．【解答】解：（1）6.8×0.46+0.54=3.128+0.54=3.668；（2）5.4×2.3+5.4×7.7=5.4×（2.3+7.7）=5.4×10=54；（3）0.25×32×12.5=0.25×（4×8）×12.5=（0.25×4）×（8×12.5）=1×100=100；（4）75÷1.25÷8=75÷（1.25×8）=75÷10=7.5．39．【解答】解：①7.8﹣7.2+0.9 =0.6+0.9=1.5②0.38+0.26+3.4 =0.64+3.4=4.04③（125﹣45）×3=80×3=240④13+[（41+22）÷9]=13+[63÷9]=13+7=20⑤6.7+2.5+3.3=（6.7+3.3）+2.5=10+2.5=12.5⑥13×25×4=13×（25×4）=13×100=130040．【解答】解：（1）12.8+2.04×9.5=12.8+19.38=32.18；（2）0.15×1999+0.15=0.15×（1999+1）=0.15×2000=300；（3）0.76×6.5﹣0.76×5.5=0.76×（6.5﹣5.5）=0.76×1=0.76；（4）78÷0.25÷0.4=78÷（0.25×0.4）=78÷0.1=780．41．【解答】解：（1）4.05÷0.5+10.75 =8.1+10.75=18.85；（2）6.8×2.7+2.7×3.2 =（6.8+3.2）×2.7=10×2.7=27；（3）6.8×0.75÷0.5=5.1÷0.5=10.2；（4）70.3﹣17.48÷7.6 =70.3﹣2.3=68；（5）8.5×1.2÷3.4 =10.2÷3.4=3；（6）13.75÷0.125﹣2.7=110﹣2.7=107.3．42．【解答】解：（1）0.75×18÷0.15=13.5÷0.15=90；（2）6.15÷0.125÷0.8=6.15÷（0.125×0.8）=6.15÷0.1=61.5；（3）4.55÷0.28﹣0.47=16.25﹣0.47=15.78；（4）1.7×2.5×0.08=1.7×（2.5×0.08）=1.7×0.2=0.34；（5）1.89×11﹣1.89=1.89×（11﹣1）=1.89×10=18.9；（6）3.6×0.35+6.4×0.35=（3.6+6.4）×0.35=10×0.35=3.5．43．【解答】解：（1）3.4+6.6÷0.3=3.4+22=25.4；（2）25×1.25×0.04×0.8=（25×0.04）×（1.25×0.8）=1×1=1；（3）99×0.73+7.3×0.1=99×0.73+0.73×1=（99+1）×0.73=100×0.73=73；（4）96.5÷1.25÷0.8=96.5÷（1.25×0.8）=96.5÷1=96.5．44．【解答】解：（1）82.4﹣12.4×5=82.4﹣62=20.4；（2）18.5﹣3.21﹣4.79=18.5﹣（3.21+4.79）=18.5﹣8=10.5；（3）8.4+3.8+1.6+6.2=8.4+1.6+3.8+6.2=（8.4+1.6）+（3.8+6.2）=10+10=20；（4）0.25×17.3×0.4 =0.25×0.4×17.3 =0.1×17.3=1.73；（5）7.2×（10+0.1）=7.2×10+7.2×0.1=72+0.72=72.72；（3）3.54×0.29﹣0.29×2.54=（3.54﹣2.54）×0.29=1×0.29=0.29．45．【解答】解：（1）0.125×32=0.125×（8×4）=（0.125×8）×4=1×4=4；（2）8.8÷0.25÷4=8.8÷（0.25×4）=8.8÷1=8.8；（3）56.5×99+56.5=56.5×（99+1）=56.5×100=5650；（4）0.78×101=0.78×（100+1）=0.78×100+0.78×1=78+0.78=78.78；（5）9.9﹣2.07÷2.3=9.9﹣0.9=9；（6）12.75÷[14.6﹣（1.3+8.2）]=12.75÷[14.6﹣9.5]=12.75÷5.1=2.5．46．【解答】解：（1）60.8﹣36÷3.6=60.8﹣10=50.8；（2）12.5×7.2×0.8=12.5×0.8×7.2=10×7.2=72；（3）99×78.5+78.5=（99+1）×78.5=100×78.5=7850；（4）24.6﹣8.9﹣1.1=24.6﹣（8.9+1.1）=24.6﹣10=14.6；（5）0.9+9.9+99.9+999.9=（0.1+0.1+0.1+0.6）+9.9+99.9+999.9=（0.1+9.9）+（0.1+99.9）+（0.1+999.9）+0.6=10+100+1000+0.6=1110.6；（6）695÷25÷4=695÷（25×4）=695÷100=6.95．47．【解答】解：（1）5.8+6.3÷9×0.5=5.8+0.7×0.5=5.8+0.35=6.15；（2）1.25×0.8÷1.25×0.8=（1.25÷1.25）×（0.8×0.8）=1×0.64=0.64；（3）1.92÷0.12﹣2.7=16﹣2.7=13.3；（4）2.65×1.7+1.35×1.7﹣1.7=（2.65+1.35﹣1）×1.7=3×1.7=5.1；（5）138÷0.25÷4=138÷（0.25×4）=138÷1=138；（6）1.25×2.5×3.2=1.25×2.5×（4×0.8）=（1.25×0.8）×（2.5×4）=1×10=10．48．【解答】解：（1）25×5+74×5+5 =（25+74+1）×5=100×5=500（2）6.74+12.62+24.38+3.26=（6.74+3.26）+（12.62+24.38）=10+37=47（3）87﹣2.123﹣0.877 =87﹣（2.123+0.877）=87﹣3=84（4）30.65﹣（7.65+5.4）=30.65﹣7.65﹣5.4=23﹣5.4=17.6（5）（40+8）×125=40×125+8×125=6000+1000=7000（6）32×38+32×62=32×（38+62）=32×100=320049．【解答】解：（1）65×102 =65×（100+2）=65×100+65×2=6500+130=6630（2）8.23﹣（2.67+3.23）=8.23﹣2.67﹣3.23 =（8.23﹣3.23）﹣2.67=5﹣2.67=2.33（3）32×16+14×32=32×（16+14）=32×30=960（4）8.46+7.26+1.51+2.84 =（8.46+1.51）+（7.26+2.84）=10+10.1=20.1（5）27×[（263+37）÷50]=27×[300÷50]=27×6=162（6）125×32×25=125×8×4×25=（125×8）×（4×25）=1000×100=10000050．【解答】解：（1）5.6×0.25 =（1.4×4）×0.25=1.4×（4×0.25）=1.4×1=1.4（2）0.32×0.25×12.5 =（0.8×0.4）×0.25×12.5=（0.8×12.5）×（0.4×0.25）=10×0.1=1 （3）6.4÷（0.3×2+0.2）=6.4÷（0.6+0.2）=6.4÷0.8=8（4）201×6.5﹣6.5 =（201﹣1）×6.5=200×6.5=1300（5）102×4.5 =（100+2）×4.5=100×4.5+2×4.5=450+9=459 （6）2.2×0.25+2.8×0.25=（2.2+2.8）×0.25=5×0.25=1.25。

五年级小数除法脱式计算练习题7.28×99+7.284.3×50×0.64－2.64×0.×0.283.94+34.3×0.28.9×1.1×4.732＋4.9－0.94.8×100.112.5×0.4×2.5×82.7×5.4×3.6.58×4.5×0.9×810.8－0.8×7.0 0.87×3.16+4.641.2×÷4.8.6×9.85-5.466.5×99＋56.54.8+ 0.3÷ 1.0.6÷× 1.258.05×3.4+7.6.8×0.5+1.584.8－4.8×0..5×10117.-.×..09×8.×40.÷ 0.81 × 0.184.× .13.×0.×826.81+6.81×990.25×185×40.4×0.8－3.4×0. ×．．2.×1.25＋4.2×1.752.37×6.3+2.37×3.70.25×39+0.25×1.256.8×0.75÷0.513.5×0.982.5×1.25×0.3 0.125×7299.75÷0.125–2.7 12.5×8..8×10.1×0.33+54×0.30.25×185×407.2.5×.69×1013.8×10.1 .5×9.81+6.81× 1.53+23.4÷5.3×6.3+2.3=.4×7.3+5.3=9.2+9×3.9=4×8.8+1.5=4.1×0.8-0.2=8.8+0.6×0.1=.9×1.4+0.6=.4×2.4+3.6=12.48-0.4×9.7= .8×1.3-0.3= .9×5.2+9.3= .8+3.1×9 .1=.8×9.1-0.5=.2×1.8-0.1=.59-0.3×4.3=3.053-0.1×5.3= .4×8.4+5.8=.908-1.3×1.6= .248-13.596-0.9×5. 6= .3+3.8×2.3=.7×0.1-0.1= 1.7+0.3×7.6=.58-.39-1.1×4.9=0.3+2.8×3.5= .9×8.2+9.2=.32.9+0.6×7.5=.6×6.5+6.4=0.2×5.6+2.5= 1.6×5-0.5=0.5×4.6+7.1=.6×0.38= .1×0.7=1.8×9.6-1.7=.6×8.9+8=.1×0.4=9.8×4.3+9.6=×1.1-0.2= ×4.5+3.2=1.3×2.2-0.2= 0.9+8.3×8.3=3×7.6=.3×8.5= 0.4×1.9= 0.8×0.5=.5×5.7+5.8=.3+6.1×4.8=1.7×4.7=8.7+3.4×9=7.7×9.9+7.7=.9×1.7+0.5=9.08-0. .9+.576- 1.5-11.25-8.99-小数除法测试题1列竖式计算小数除以整数时,1、按整数除法的方法去除,商的小数点要和被除数的小数点对齐。