题目内容
(2013?长沙县模拟)用你喜欢的方法计算下面各题.
×
+
÷
0.125×32×25
123×5.67+8.77×567.
0.52×2
+7
×0.52.
| 5 |
| 8 |
| 11 |
| 10 |
| 3 |
| 8 |
| 10 |
| 11 |
0.125×32×25
123×5.67+8.77×567.
0.52×2
| 4 |
| 9 |
| 5 |
| 9 |
分析:(1)(3)(4)运用乘法分配律解答;
(2)化32=8×4,再运用乘法结合律解答.
(2)化32=8×4,再运用乘法结合律解答.
解答:解:(1)
×
+
÷
=(
+
)×
=1×
=1
;
(2)0.125×32×25
=(0.125×8)×(4×25)
=1×100
=100;
(3)123×5.67+8.77×567
=(1.23+8.77)×567
=10×567
=5670;
(4)0.52×2
+7
×0.52
=0.52×(2
+7
)
=0.52×10
=5.2.
| 5 |
| 8 |
| 11 |
| 10 |
| 3 |
| 8 |
| 10 |
| 11 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
| 11 |
| 10 |
=1×
| 11 |
| 10 |
=1
| 1 |
| 10 |
(2)0.125×32×25
=(0.125×8)×(4×25)
=1×100
=100;
(3)123×5.67+8.77×567
=(1.23+8.77)×567
=10×567
=5670;
(4)0.52×2
| 4 |
| 9 |
| 5 |
| 9 |
=0.52×(2
| 4 |
| 9 |
| 5 |
| 9 |
=0.52×10
=5.2.
点评:本题主要考查学生正确运用简便方法解决问题的能力.
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