题目内容
| 1 |
| 37 |
| 5 |
| 2 |
| 5 |
| 12 |
| 4 |
| 37 |
| 5 |
| 9 |
| 8 |
| 37 |
分析:先根据积不变规律,把三个乘法算式都变成含有
这一因数的算式,然后再运用乘法分配律简算.
| 5 |
| 37 |
解答:解:
×
+
×
+
×
,
=
×
+
×
+
×
,
=
×(
+
+
),
=
×
,
=
.
| 1 |
| 37 |
| 5 |
| 2 |
| 5 |
| 12 |
| 4 |
| 37 |
| 5 |
| 9 |
| 8 |
| 37 |
=
| 5 |
| 37 |
| 1 |
| 2 |
| 5 |
| 37 |
| 1 |
| 3 |
| 5 |
| 37 |
| 8 |
| 9 |
=
| 5 |
| 37 |
| 1 |
| 2 |
| 1 |
| 3 |
| 8 |
| 9 |
=
| 5 |
| 37 |
| 31 |
| 18 |
=
| 155 |
| 666 |
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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