题目内容
计算:(
+
-
)×24.
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 2 |
分析:利用乘法分配律进行计算即可得解.
解答:解:(
+
-
)×24,
=
×24+
×24-
×4,
=4+6-12,
=-2.
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 2 |
=4+6-12,
=-2.
点评:本题考查了有理数的乘法,利用运算定律可以使计算更加简便.
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