题目内容
(1)15÷
÷
=15×
×
=
(2)
÷
×
=
○
○
.
| 10 |
| 11 |
| 3 |
| 7 |
=15×
| 11 |
| 10 |
| 11 |
| 10 |
| 7 |
| 3 |
| 7 |
| 3 |
=
| 77 |
| 2 |
| 77 |
| 2 |
(2)
| 6 |
| 7 |
| 3 |
| 4 |
| 21 |
| 6 |
=
| 6 |
| 7 |
| 6 |
| 7 |
| 4 |
| 3 |
| 4 |
| 3 |
| 21 |
| 6 |
| 21 |
| 6 |
分析:(1)除以一个数等于乘这个数的倒数,然后约分计算;
(2)根据除以一个数等于乘这个数的倒数,把除法变为乘法.
(2)根据除以一个数等于乘这个数的倒数,把除法变为乘法.
解答:解:(1)15÷
÷
,
=15×
×
,
=
;
(2)
÷
×
,
=
×
×
,
=4.
故答案为:
,
,
,
,×,
,×,
.
| 10 |
| 11 |
| 3 |
| 7 |
=15×
| 11 |
| 10 |
| 7 |
| 3 |
=
| 77 |
| 2 |
(2)
| 6 |
| 7 |
| 3 |
| 4 |
| 21 |
| 6 |
=
| 6 |
| 7 |
| 4 |
| 3 |
| 21 |
| 6 |
=4.
故答案为:
| 11 |
| 10 |
| 7 |
| 3 |
| 77 |
| 2 |
| 6 |
| 7 |
| 4 |
| 3 |
| 21 |
| 6 |
点评:此题考查了“除以一个数等于乘这个数的倒数”这一知识点.
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