题目内容
15-3
÷
×1
.
| 7 |
| 9 |
| 6 |
| 7 |
| 2 |
| 7 |
分析:把除法变为乘法,先算乘法,再算减法.
解答:解:15-3
÷
×1
,
=15-
×
×
,
=15-5
,
=9
.
| 7 |
| 9 |
| 6 |
| 7 |
| 2 |
| 7 |
=15-
| 34 |
| 9 |
| 7 |
| 6 |
| 9 |
| 7 |
=15-5
| 2 |
| 3 |
=9
| 1 |
| 3 |
点评:完成此题,主要掌握分数四则混和运算的顺序和运算法则.
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