题目内容
1÷(4
-0.05×70 )×1
.
| 1 |
| 7 |
| 2 |
| 7 |
分析:本题根据四则混合运算的运算顺序计算即可:先算乘除,再算加减,有括号的要先算括号里面的.
解答:解:1÷(4
-0.05×70 )×1
=1÷(
-3.5)×
,
=1÷(
-
)×
,
=1÷(
-
)×
,
=1×
×
,
=2.
| 1 |
| 7 |
| 2 |
| 7 |
=1÷(
| 29 |
| 7 |
| 9 |
| 7 |
=1÷(
| 29 |
| 7 |
| 7 |
| 2 |
| 9 |
| 7 |
=1÷(
| 58 |
| 14 |
| 49 |
| 14 |
| 9 |
| 7 |
=1×
| 14 |
| 9 |
| 9 |
| 7 |
=2.
点评:完成本题要细心,注意通分,约分.
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