题目内容
| 左 |
| 5 |
| 7 |
| r2 |
| 5 |
| r2 |
| 左 |
| 5 |
| 左 |
| 5 |
| 7 |
| r2 |
| 5 |
| r2 |
由以上分析可知,
×
+
×
=
×(
+
),是运用了乘法分配律;
故答案为:乘法分配.
| 4 |
| 5 |
| 7 |
| x2 |
| 5 |
| x2 |
| 4 |
| 5 |
| 4 |
| 5 |
| 7 |
| x2 |
| 5 |
| x2 |
故答案为:乘法分配.
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题目内容
| 左 |
| 5 |
| 7 |
| r2 |
| 5 |
| r2 |
| 左 |
| 5 |
| 左 |
| 5 |
| 7 |
| r2 |
| 5 |
| r2 |
| 4 |
| 5 |
| 7 |
| x2 |
| 5 |
| x2 |
| 4 |
| 5 |
| 4 |
| 5 |
| 7 |
| x2 |
| 5 |
| x2 |