题目内容
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
4
4
; | 2 |
| 9 |
| 3 |
| 9 |
| 4 |
| 9 |
| 1 |
| 9 |
| 1 |
| 9 |
9
9
=1
1
.分析:分数乘整数的意义与整数乘法的意义相同,都是求几个相同加数的和的运算,所以
+
+
+
=
×4;因为
+
+
=
,所以
+
+
=
×9=1.
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 2 |
| 9 |
| 3 |
| 9 |
| 4 |
| 9 |
| 9 |
| 9 |
| 2 |
| 9 |
| 3 |
| 9 |
| 4 |
| 9 |
| 1 |
| 9 |
解答:解:
+
+
+
=
×4;
因为
+
+
=
,所以
+
+
=
×9=1.
故答案为:
,4,
,1.
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
因为
| 2 |
| 9 |
| 3 |
| 9 |
| 4 |
| 9 |
| 9 |
| 9 |
| 2 |
| 9 |
| 3 |
| 9 |
| 4 |
| 9 |
| 1 |
| 9 |
故答案为:
| 1 |
| 4 |
| 1 |
| 9 |
点评:在分数乘法中,分数乘整数与整数乘分数的乘法意义是不同的.
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