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小学人教版五年级数学上册简便运算题集
第一类
①2.27＋0.73＋2.27 ②2.35＋5.18＋4.82
③1.29＋3.7＋2.71＋6.3 ④2.64＋8.67＋7.36＋11.33
⑤3.29＋0.73－2.29＋2.27 ⑥3.25＋1.79－0.59＋1.75
第二类
①3.25－0.73－2.27 ②23.15－4.75－3.25
③8－2.45－1.55 ④14－7.32－2.68
⑤12.7－（3.7＋0.84） ⑥ 8.325－3.29－3.325
第三类
①3.75－(2.75－1.3) ②3.75－(2.8－1.25)
③ 7.5＋2.5－7.5＋2.5 ④1.23＋3.4－0.23＋6.6
第四类
①3.29×0.25×4 ②0.25×0.73×4
③5.25×1.25×0.8 ④1.25×0.73×8
第五类
①0.125×8.8 ②0.25×4.4
③0.25×36 ④0.25×0.28
⑤1.25×3.2 ⑥0.125×72
第六类
① 0.125×3.2×2.5 ②0.125×6.4×2.5×5
③ 25×6.4×12.5 ④ 12.5×9.6×0.25
第七类
①0.32×403 ②35×10.2
③3.5×101－3.5 ④7.5×101-7.5
⑤0.85×199 ⑥4.6×99
第八类
①0.25×4÷0.25×4 ②5.25×8÷5.25×8
第九类
①3.5×9.9＋3.5×0.1 ②7.6×0.8＋0.2×7.6
③3.5×2.7－3.5×0.7 ④ 0.86×15.7－0.86×14.7
第十类
①7.2×1.25 ②3.6×0.25
③3.4÷9＋5.6÷9 ④ 5.1÷11＋5.9÷11
⑤0.77÷14 ⑥4.9÷1.4
第十一类
①(32＋5.6)÷0.8 ②10÷3.14-6.86÷3.14
第十二类
①7÷0.125 ②0.9÷0.25
③2.325÷8÷0.125 ④7÷0.25÷4
⑤7.35÷(7.35×0.25) ⑥3.35÷(3.35÷0.25)
第十三类
①12.5×2.5×（0.8＋0.4） ②1.25×2.5×（0.8＋2）
第十四类
①1.8×4 ＋3.8×4－0.6×4 ②4.4×7＋9.6×7－4×7
第十五类
①5×4.2＋6×4.2－4.2 ②4.6×6.8-6.8＋6.8×6.4
小学人教版五年级数学简便运算题集(参考答案)
第一类
①2.27＋0.73＋2.27 ②2.35＋5.18＋4.82
=2.27＋（0.73＋2.27） ＝2.35＋（5.18＋4.82）
=2.27＋3 ＝2.35＋10
=5.27 ＝12.35
③1.29＋3.7＋2.71＋6.3 ④2.64＋8.67＋7.36＋11.33
=（1.29＋2.71）＋（3.7＋6.3） =(2.64＋7.36)＋(8.67＋11.33)
=4＋10 =10＋20
=14 =30
⑤3.29＋0.73－2.29＋2.27 ⑥3.25＋1.79－0.59＋1.75
=（3.29－2.29）＋（0.73＋2.27） =（3.25＋1.75）＋（1.79－0.59）
=1＋3 =5＋1.2
=4 =6.2
第二类
①3.25－0.73－2.27 ②23.15－4.75－3.25
=3.25－（0.73＋2.27） =23.15－（6.75＋3.25）
=3.25－3 =23.15－10
=0.25 =13.15
③8－2.45－1.55 ④14－7.32－2.68
=8－（2.45＋1.55） =14－（7.32＋2.68）
=8－4 =14－10
=4 =4
⑤12.7－（3.7＋0.84） ⑥ 8.325－3.29－3.325
=12.7－3.7－0.84 =8.325－3.325－3.29
=9－0.84 =5－3.29
=8.14 =1.71
第三类
①3.75－(2.75－1.3) ②3.75－(2.8－1.25)
=3.75－2.75＋1.3 =3.75＋1.25－2.8
=1＋1.3 =5－2.8
=2.3 =2.2
③ 7.5＋2.5－7.5＋2.5 ④1.23＋3.4－0.23＋6.6
=（7.5－7.5）＋（2.5＋2.5） =（1.23－0.23）＋（3.4＋6.6）
=0＋5 =1＋10
=5 =11
第四类
①3.29×0.25×4 ②0.25×0.73×4
=3.29×（0.25×4） =0.25×4×0.73
=3.29×1 =1×0.73
=3.29 =0.73
③5.25×1.25×0.8 ④1.25×0.73×8
=5.25×（1.25×0.8） =1.25×8×0.73
=5.25×1 =10×0.73
=5.25 =7.3
第五类
①0.125×8.8 ②0.25×4.4
=0.125×8×1.1 =0.25×4×1.1
=1×1.1 =1×1.1
=1.1 =1.1
③0.25×36 ④0.25×0.28
=0.25×4×9 =0.25×4×0.07
=1×9 =1×0.07
=9 =0.07
⑤1.25×3.2 ⑥0.125×72
=1.25×（0.8×4） =0.125×（8×9）
=1.25×0.8×4 =0.125×8×9
=1×4 =1×9
=4 =9
第六类
① 0.125×3.2×2.5 ②0.125×6.4×2.5×5
=（0.125×8）×（0.4×2.5） =0.125×（8×0.4×2）×2.5×5
=1×1 =（0.125×8）×（0.4×2.5）×（2×5 ）
=1 =1×1 ×10
=10
③ 25×6.4×12.5 ④ 12.5×9.6×0.25
=25×（4×0.2×8）×12.5 =(12.5×0.8)×3×(4×0.25)
=（25×4）×（8×12.5）×0.2 =10×3×1
=100×100×0.2 =30
=2000
第七类
①0.32×403 ②35×10.2
=0.32×（400+3） =35×（10＋0.2）
=0.32×400＋0.32×3 =35×10＋35×0.2
=128＋0.96 =350＋7
=128.96 =357
③3.5×101－3.5 ④7.5×101-7.5
=3.5×101－3.5×1 =7.5×101－7.5×1
=3.5×（101－1） =7.5×（101－1）
=3.5×100 =7.5×100
=350 =750
⑤0.85×199 ⑥4.6×99
=0.85×（200－1） =4.6×（100－1）
=0.85×200－0.85×1 =4.6×100－4.6×1
=170-0.85 =460－4.6
=169.15 =455.4
第八类
①0.25×4÷0.25×4 ②5.25×8÷5.25×8
=（0.25÷0.25）×（4×4） =（1.25÷1.25）×（8×8）
=1×16 =1×64
=16 =64
第九类
①3.5×9.9＋3.5×0.1 ②7.6×0.8＋0.2×7.6
=3.5×（9.9＋0.1） =7.6×（0.8＋0.2）
=3.5×10 =7.6×1
=35 =7.6
③3.5×2.7－3.5×0.7 ④ 0.86×15.7－0.86×14.7
=3.5×（2.7－0.7） =0.86×（15.7－14.7）
=3.5×2 =0.86× 1
=7 =0.86
第十类
①7.2×1.25 ②3.6×0.25
=(8－0.8) ×0.125 =(4－0.4)×0.25
=8×1.25－0.8×1.25 =4×0.25－0.4×0.25
=10－1 =1－0.1
=9 =0.9
③3.4÷9＋5.6÷9 ④ 5.1÷11＋5.9÷11
=（3.4＋5.6）÷9 =（5.1＋5.9）÷11
=9÷9 =11÷11
=1 =1
⑤0.77÷14 ⑥4.9÷1.4
=0.77 ÷（7×0.2） =4.9÷（7×0.2）
=0.77÷7÷2 =4.9÷7÷0.2
=0.11÷2 =0.7÷0.2
=0.055 =3.5
第十一类
①(32＋5.6)÷0.8 ②10÷3.14-6.86÷3.14
=32÷0.8＋5.6÷0.8 =(10-6.86)÷3.14
=40＋7 =3.14÷3.14
=47 =1
第十二类
①7÷0.125 ②0.9÷0.25
(7×8)÷(0.125×8) =(0.9×4)÷(0.25×4)
=56×1 =3.6÷1
=56 =3.6
③2.325÷8÷0.125 ④7÷0.25÷4
=2.325÷（8×0.125） =7÷（0.25×4）
=2.325÷1 =7÷1
=2.325 =7
⑤7.35÷(7.35×0.25) ⑥3.35÷(3.35÷0.25)
=7.35÷7.35÷0.25 =3.35÷3.35×0.25
=1÷0.25 =1×0.25
=4 =0.25
第十三类
①12.5×2.5×（0.8＋0.4） ②1.25×2.5×（0.8＋2）
=12.5×2.5×0.8＋12.5×2.5×0.4 =12.5×2.5×0.8＋1.25×2.5×2
=25＋12.5 =25＋6.25
=37.5 =31.25
第十四类
①1.8×4 ＋3.8×4－0.6×4 ②4.4×7＋9.6×7－4×7
=（1.8＋3.8－0.6）×4 =（4.4＋9.6－4）×7
=5×4 =10×7
=20 =70
第十五类
①5×4.2＋6×4.2－4.2 ②4.6×6.8-6.8＋6.8×6.4
＝5×4.2＋6×4.2－4.2×1 ＝4.6×6.8-6.8×1＋6.8×6.4
＝（5＋6－1）×4.2 ＝（4.6-1＋6.4）×6.8
＝10×4.2 ＝10×6.8
＝42 ＝68

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