题目内容
(
-
)×63-
.
| 1 |
| 7 |
| 1 |
| 9 |
| 2 |
| 3 |
分析:先按乘法分配律算前部分(
-
)×63,再算减
.
| 1 |
| 7 |
| 1 |
| 9 |
| 2 |
| 3 |
解答:解:(
-
)×63-
,
=
×63-
×63-
,
=9-7-
,
=2-
,
=1
.
| 1 |
| 7 |
| 1 |
| 9 |
| 2 |
| 3 |
=
| 1 |
| 7 |
| 1 |
| 9 |
| 2 |
| 3 |
=9-7-
| 2 |
| 3 |
=2-
| 2 |
| 3 |
=1
| 1 |
| 3 |
点评:此题考查了乘法分配律的灵活运用.
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