题目内容
脱式计算:
÷
×2
÷
÷
÷27×
.
| 3 |
| 4 |
| 2 |
| 3 |
| 9 |
| 10 |
| 3 |
| 8 |
| 1 |
| 5 |
| 9 |
| 10 |
| 3 |
| 5 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)把除法化成乘法,再约分计算即可;
(2)把除法化成乘法,再约分计算即可;
(3)把除法化成乘法,再约分计算即可.
(2)把除法化成乘法,再约分计算即可;
(3)把除法化成乘法,再约分计算即可.
解答:
解:(1)
÷
×2
=
×
×2
=
=
;
(2)
÷
÷
=
×
×5
=
=12;
(3)
÷27×
=
×
×
=
=
.
| 3 |
| 4 |
| 2 |
| 3 |
=
| 3 |
| 4 |
| 3 |
| 2 |
=
| 3×3×2 |
| 4×2 |
=
| 9 |
| 4 |
(2)
| 9 |
| 10 |
| 3 |
| 8 |
| 1 |
| 5 |
=
| 9 |
| 10 |
| 8 |
| 3 |
=
| 9×8×5 |
| 10×3 |
=12;
(3)
| 9 |
| 10 |
| 3 |
| 5 |
=
| 9 |
| 10 |
| 1 |
| 27 |
| 3 |
| 5 |
=
| 9×1×3 |
| 10×27×5 |
=
| 1 |
| 50 |
点评:同级运算,按照从左到右的顺序计算即可,注意要进行约分,把结果化成最简分数.
练习册系列答案
相关题目
下面算式中的括号,去掉后不改变计算结果的是( )
| A、(63-27)÷9 |
| B、(8×4)-20 |
| C、62-(38-17) |