题目内容
(2011?广州模拟)36×(
+
-
)
| 7 |
| 12 |
| 5 |
| 9 |
| 1 |
| 4 |
分析:利用乘法分配律计算简便即36和括号里的每一个数相乘.
解答:解:36×(
+
-
),
=36×
+36×
-36×
,
=21+20-9,
=32.
| 7 |
| 12 |
| 5 |
| 9 |
| 1 |
| 4 |
=36×
| 7 |
| 12 |
| 5 |
| 9 |
| 1 |
| 4 |
=21+20-9,
=32.
点评:此题考查乘法分配律.
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