题目内容
| 18 |
| 25 |
| 5 |
| 12 |
| 7 |
| 12 |
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分析：运用乘法分配律简算．
解答：解：
×
+
×
=
×（
+
）
=
×1
=
．
| 18 |
| 25 |
| 5 |
| 12 |
| 7 |
| 12 |
| 18 |
| 25 |
=
| 18 |
| 25 |
| 5 |
| 12 |
| 7 |
| 12 |
=
| 18 |
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=
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点评：乘法分配律是最常用的简便运算的方法，要熟练掌握，灵活运用．
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