题目内容
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| 3 |
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| 5 |
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| 7 |
| 10 |
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分析:利用乘法分配律的逆运算,同时提取
,然后计算出结果.
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解答:解:
×
+
×
-
×
=(
+
-
)×
=0×
=0.
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| 1 |
| 3 |
| 1 |
| 5 |
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| 3 |
| 7 |
| 10 |
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| 3 |
=(
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| 2 |
| 1 |
| 5 |
| 7 |
| 10 |
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| 3 |
=0×
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| 3 |
=0.
点评:此题考查乘法分配律在分数中的运用.
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