题目内容
-32
÷(-8×4).
| 16 | 25 |
分析:首先计算括号里面的乘法,再计算除法,注意在计算乘除法时要先判断符号,再计算.
解答:解:原式=-32
÷(-32)
=-32
×(-
)
=32
×
=(32+
)×
=32×
+
×
=1+
=1
.
| 16 |
| 25 |
=-32
| 16 |
| 25 |
| 1 |
| 32 |
=32
| 16 |
| 25 |
| 1 |
| 32 |
=(32+
| 16 |
| 25 |
| 1 |
| 32 |
=32×
| 1 |
| 32 |
| 16 |
| 25 |
| 1 |
| 32 |
=1+
| 1 |
| 50 |
=1
| 1 |
| 50 |
点评:此题主要考查了有理数的乘除法,关键是正确判断结果的符号.
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