内容正文:
暑假计算题:小数乘除法简算-数学五年级上册人教版
1.脱式计算,能简算的要简算。
17.8×5.6+12.2×5.6
198×0.37
1.25×32×2.5
(0.69+0.43)×0.12
0.87×5.6+6.23
35.4×99+35.4
2.脱式计算(能简算的要简算)
(1)3.8+4.29+2.71+6.2
(2)4.5×8×12.5
(3)3.6×6.3+6.3×6.4
3.用递等式计算,能简算的要简算
(1)0.45×5.4-0.45×3.4
(2)2.87÷12.5÷0.8
4.脱式计算。
(1)0.79×15.4-5.4×0.79
(2)9.8÷0.25÷0.4
(3)0.6×99+0.6
(4)(3.2+0.12)÷0.8
5.脱式计算
(1)1.7×3.5+1.7×1.5
(2)3.6÷0.6×1.5
6.脱式计算。
(1)43.5×1.8×5
(2)0.12×32×1.25
(3)4×1.98×0.25
7.脱式计算,能简算的要简算。
(1)5.03-2.8+2.97
(2)9.6÷2.5÷0.4
(3)2.9×101-2.9
(4)(2.4+0.928)÷0.8
8.脱式计算,怎样简便就怎样计算
(1)4.05÷0.5-1.14
(2)2.4×[11.4÷(1.9+1.1)]
(3)25×0.69×0.4
(4)8.5×27+8.5+8.5×72
9.脱式计算,能简算的要简算。
(1)(16.8+1.47)÷0.3
(2)8.9×0.25×4
10.脱式计算,能简算的要简算
(1)(5.6-2.8)÷1.4
(2)0.175÷0.25÷4
(3)28.6×101-28.6
11.脱式计算,能简算的要简算
①4×3.8×0.25
②(39.8-5.8)×1.6
③5.85×11-5.85
④12.36÷1.25÷0.8
⑤57.6×18.8-56.7×18.8
⑥69×10.1
12.脱式计算,能简算的要简算哦!
①2.5×3.8×0.4
②3.47×12.4-3.47×2.4
③0.49×101
④0.125×32
⑤27.9×99+27.9
⑥4.53+5.47×0.4
13.脱式计算(能简算的要简算)
①0.5×423×2
②0.32×1.25×2.5
③0.78×101
④7.54×99+7.54
⑤3.05×12.7-3.05×2.7
⑥72.75×0.28+2.725×2.8
14.脱式计算(用简便方法计算)
(1)2.5×3.2×1.25
(2)101×5.4
(3)3.96×2.6+3.96×7.4
15.
脱式计算,能简算的要简算。
(1)4.7×10.2
(2)2.5×8×0.4×0.125
(3)4.85×9.9+4.85×0.1
16.用递等式计算。
(1)9.6÷0.4×0.25
(2)0.9×3.6+1.1×3.6
(3)12.6-12.6÷2
17.脱式计算。
①12.5×3.2
②6.45×5.8-6.45×1.8
③0.25×99
④0.28÷0.7×1.5
⑤23.9×0.25×8
⑥7.6×10.1
18.脱式计算,你认为怎样简便就怎样计算。
(1)4×0.8×12.5×2.5
(2)4.2÷0.5+0.32
(3)0.76+7.6×9.9
19.用递等式计算,能简算的要简算。
①3.67×99+3.67
②21÷2.5÷0.4
③4.64+5.36×2
④93.7×0.32+93.7×0.68
⑤0.125×32×0.25
⑥4.5×10.1
20.脱式计算。
(1)12.5×0.45×0.8
(2)3.45×99
(3)2.7×1.43+0.57×2.7
(4)16.6÷5×1.7
答案解析部分
1.【答案】解:17.8×5.6+12.2×5.6
=(17.8+12.2)×5.6
=30×5.6
=168
198×0.37
=(200-2)×0.37
=200×0.37-2×0.37
=74-0.74
=73.26
1.25×32×2.5
=(1.25×8)×(4×2.5)
=10×10
=100
(0.69+0.43)×0.12
=1.12×0.12
=0.1344
0.87×5.6+6.23
=4.872+6.23
=11.102
35.4×99+35.4
=35.4×(99+1)
=35.4×100
=3540
2.【答案】(1)解:3.8+4.29+2.71+6.2
=(3.8+6.2)+(4.29+2.71)
=10+7
=17
(2)解:4.5×8×12.5
=4.5×(8×12.5)
=4.5×100
=450
(3)解:3.6×6.3+6.3×