题目内容
脱式计算
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考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)、(2)、(3)、(5)、(6)、按照从左向右的顺序进行计算;
(4)先算除法,再算减法.
(4)先算除法,再算减法.
解答:
解:(1)
÷8÷
=
÷
=
;
(2)
×
×
=
×
=
;
(3)
×
÷
=
÷
=
;
(4)
-
÷
=
-
=
;
(5)
÷
×
=
×
=
;
(6)
×
÷
=
÷
=
.
| 7 |
| 19 |
| 14 |
| 5 |
=
| 7 |
| 152 |
| 14 |
| 5 |
=
| 5 |
| 304 |
(2)
| 3 |
| 5 |
| 5 |
| 27 |
| 3 |
| 8 |
=
| 1 |
| 9 |
| 3 |
| 8 |
=
| 1 |
| 24 |
(3)
| 1 |
| 4 |
| 8 |
| 9 |
| 10 |
| 9 |
=
| 2 |
| 9 |
| 10 |
| 9 |
=
| 1 |
| 5 |
(4)
| 5 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
=
| 5 |
| 9 |
| 4 |
| 9 |
=
| 1 |
| 9 |
(5)
| 2 |
| 3 |
| 15 |
| 28 |
| 15 |
| 21 |
=
| 56 |
| 45 |
| 15 |
| 21 |
=
| 8 |
| 9 |
(6)
| 7 |
| 10 |
| 5 |
| 16 |
| 21 |
| 32 |
=
| 7 |
| 32 |
| 21 |
| 32 |
=
| 1 |
| 3 |
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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