题目内容
| 11 |
| 12 |
| 3 |
| 4 |
| 11 |
| 12 |
| 1 |
| 4 |
分析:直接利用乘法分配律简算.
解答:解:
×
+
×2
=
×(
+2
)
=
×3
=
.
| 11 |
| 12 |
| 3 |
| 4 |
| 11 |
| 12 |
| 1 |
| 4 |
=
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 4 |
=
| 11 |
| 12 |
=
| 11 |
| 4 |
点评:此题考查乘法分配律的运用:(a+b)c=ac+bc.
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题目内容
| 11 |
| 12 |
| 3 |
| 4 |
| 11 |
| 12 |
| 1 |
| 4 |
| 11 |
| 12 |
| 3 |
| 4 |
| 11 |
| 12 |
| 1 |
| 4 |
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 4 |
| 11 |
| 12 |
| 11 |
| 4 |