题目内容
(2.75+2
÷7
)×(3.12-12
÷6
)÷3
.
| 2 |
| 3 |
| 1 |
| 6 |
| 62 |
| 75 |
| 5 |
| 6 |
| 5 |
| 12 |
分析:先算小括号里面的除法,再算小括号里面的加法和减法,再算括号外面的乘法、除法.
解答:解:
(2.75+2
÷7
)×(3.12-12
÷6
)÷3
=(2.75+
)×(3.12-
)÷3
=
×
÷3
=
÷3
=
.
(2.75+2
| 2 |
| 3 |
| 1 |
| 6 |
| 62 |
| 75 |
| 5 |
| 6 |
| 5 |
| 12 |
=(2.75+
| 16 |
| 43 |
| 1924 |
| 1025 |
| 5 |
| 12 |
=
| 537 |
| 172 |
| 1274 |
| 1025 |
| 5 |
| 12 |
=
| 342069 |
| 88150 |
| 5 |
| 12 |
=
| 2052414 |
| 1807075 |
点评:考查了分数四则混合运算.注意运算顺序和运算法则,然后再进一步计算.
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