题目内容
| 下面各题,怎样算简便就怎样算. 9-
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分析:算式(1)、(2)、(3)、(5)、(6)根据分数的四则混合运算顺序进行计算即可,能约分的可直接约分;
算式(4)可交换
与
的位置,然后再按照分数的四则混合运算进行计算即可.
算式(4)可交换
| 1 |
| 2 |
| 35 |
| 36 |
解答:解:(1)9-
÷9
=9-
,
=8
;
(2)
×
×
=
×
,
=
;
(3)
×
×
=
;
(4)
÷
÷
=
÷
÷
,
=
÷
,
=1
;
(5)
×
×
=
;
(6)
×
÷
=
÷
,
=1
.
| 9 |
| 20 |
=9-
| 1 |
| 20 |
=8
| 19 |
| 20 |
(2)
| 7 |
| 12 |
| 3 |
| 7 |
| 5 |
| 6 |
=
| 1 |
| 4 |
| 5 |
| 6 |
=
| 5 |
| 24 |
(3)
| 5 |
| 12 |
| 7 |
| 25 |
| 3 |
| 14 |
=
| 1 |
| 40 |
(4)
| 7 |
| 9 |
| 1 |
| 2 |
| 35 |
| 36 |
=
| 7 |
| 9 |
| 35 |
| 36 |
| 1 |
| 2 |
=
| 4 |
| 5 |
| 1 |
| 2 |
=1
| 3 |
| 5 |
(5)
| 3 |
| 5 |
| 8 |
| 9 |
| 5 |
| 8 |
=
| 1 |
| 3 |
(6)
| 17 |
| 12 |
| 3 |
| 34 |
| 2 |
| 19 |
=
| 1 |
| 8 |
| 2 |
| 19 |
=1
| 3 |
| 16 |
点评:完成本题要注意分析式中数据,能直接约分的要进行约分.
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