题目内容
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
分析:
×4表示4个
相加的和是多少,改写成加法算式为:
+
+
+
.
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
解答:解:
×4改写成加法算式为:
+
+
+
.
故答案为:
+
+
+
.
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
故答案为:
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
点评:乘法的意义为:求几个相同加数和的简便计算.
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