题目内容
神机妙算.
|
|
(
|
分析:(1)(2)把除法变为乘法,约分计算.
(3)先算括号内的,再算括号外的.
(3)先算括号内的,再算括号外的.
解答:解:(1)
×
÷
=
×
×
=1
(2)
÷
÷
=
×
×
=6
(3)(
-
)÷
=
×56
=2
| 5 |
| 9 |
| 3 |
| 4 |
| 5 |
| 12 |
=
| 5 |
| 9 |
| 3 |
| 4 |
| 12 |
| 5 |
=1
(2)
| 9 |
| 10 |
| 2 |
| 5 |
| 3 |
| 8 |
=
| 9 |
| 10 |
| 5 |
| 2 |
| 8 |
| 3 |
=6
(3)(
| 3 |
| 4 |
| 5 |
| 7 |
| 1 |
| 56 |
=
| 1 |
| 28 |
=2
点评:本题考查了学生通过约分对分数四则混合运算题目进行简算的能力.
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