题目内容
计算:
+45.6×
+53.4×
=
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25
25
.分析:化
=
×1,再运用乘法分配律解答.
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解答:解:
+45.6×
+53.4×
,
=
×(1+45.6+53.4),
=
×100,
=25.
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| 4 |
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| 4 |
=
| 1 |
| 4 |
=
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| 4 |
=25.
点评:解答本题的关键是把
化为
×1,进一步利用乘法分配律计算.
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| 1 |
| 4 |
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