题目内容
| 计算题. 14×
|
|
|
| ||||||||||||||||
|
| 12÷
|
|
考点:分数乘法
专题:运算顺序及法则
分析:根据分数乘除法的计算方法,进行约分计算即可.
解答:
解:(1)14×
=
;
(2)
×
=
;
(3)
×42×
=
=20;
(4)
×
×
=
=
;
(5)
÷
=
;
(6)
÷14=
;
(7)12÷
÷
=12×
×
=
=30;
(8)
×2÷
=
×2×
=
=
.
| 5 |
| 21 |
| 10 |
| 3 |
(2)
| 7 |
| 12 |
| 9 |
| 21 |
| 1 |
| 4 |
(3)
| 5 |
| 6 |
| 4 |
| 7 |
=
| 5×42×4 |
| 6×7 |
=20;
(4)
| 4 |
| 51 |
| 3 |
| 8 |
| 17 |
| 18 |
=
| 4×3×17 |
| 51×8×18 |
=
| 1 |
| 36 |
(5)
| 9 |
| 20 |
| 3 |
| 4 |
| 3 |
| 5 |
(6)
| 7 |
| 12 |
| 1 |
| 24 |
(7)12÷
| 2 |
| 3 |
| 3 |
| 5 |
=12×
| 3 |
| 2 |
| 5 |
| 3 |
=
| 12×3×5 |
| 2×3 |
=30;
(8)
| 5 |
| 6 |
| 5 |
| 8 |
=
| 5 |
| 6 |
| 8 |
| 5 |
=
| 5×2×8 |
| 6×5 |
=
| 8 |
| 3 |
点评:此题考查了分数的约分计算方法.
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