题目内容
2
÷(3
-
)×1
.
| 4 |
| 9 |
| 2 |
| 5 |
| 11 |
| 15 |
| 1 |
| 11 |
分析:先算小括号里面的减法,再把除法变成乘法,运用乘法交换律简算.
解答:解:2
÷(3
-
)×1
,
=2
÷
×1
,
=
×
×
,
=
×
×
,
=
×
,
=1.
| 4 |
| 9 |
| 2 |
| 5 |
| 11 |
| 15 |
| 1 |
| 11 |
=2
| 4 |
| 9 |
| 8 |
| 3 |
| 1 |
| 11 |
=
| 22 |
| 9 |
| 3 |
| 8 |
| 12 |
| 11 |
=
| 22 |
| 9 |
| 12 |
| 11 |
| 3 |
| 8 |
=
| 8 |
| 3 |
| 3 |
| 8 |
=1.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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