题目内容
算一算.
÷14
÷20
÷4
÷2.
| 7 |
| 9 |
| 15 |
| 16 |
| 1 |
| 8 |
| 4 |
| 5 |
分析:一个分数除以一个不为0的数,可以用这个分数乘以这个数的倒数;据此计算.
解答:解:①
÷14,
=
×
,
=
;
②
÷20
=
×
,
=
;
③
÷4,
=
×
,
=
;
④
÷2,
=
×
,
=
.
| 7 |
| 9 |
=
| 7 |
| 9 |
| 1 |
| 14 |
=
| 1 |
| 18 |
②
| 15 |
| 16 |
=
| 15 |
| 16 |
| 1 |
| 20 |
=
| 3 |
| 64 |
③
| 1 |
| 8 |
=
| 1 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 32 |
④
| 4 |
| 5 |
=
| 4 |
| 5 |
| 1 |
| 2 |
=
| 2 |
| 5 |
点评:本题考查了分数除法的计算法则的掌握情况.
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