题目内容
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
5
5
.分析:“
+
+
+
+
=”是求5个
相加的和是多少,根据分数乘整数的乘法意义可知,
+
+
+
+
=
×5.
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
解答:解:
+
+
+
+
=
×5.
故答案为:
,5.
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
| 5 |
| 13 |
故答案为:
| 5 |
| 13 |
点评:分数乘整数的乘法意义与整数乘法意义相同的,都是求几个相同加法数的和的简便运算.
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