题目内容
用递等式计算
|
|
15÷
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4×
|
|
|
分析:根据分数的四则混合运算进行计算即可得到答案.
解答:解:(1)
×
×
,
=
×
,
=
;
(2)
×
×15,
=
×15,
=2;
(3)15÷
×
,
=15×
×
,
=
×
,
=10;
(4)4×
÷
,
=
×
,
=3;
(5)
÷
÷
,
=
×
×
,
=
×
,
=1
;
(6)
÷
×
,
=
×
×
,
=
×
,
=
.
| 4 |
| 7 |
| 21 |
| 10 |
| 2 |
| 5 |
=
| 6 |
| 5 |
| 2 |
| 5 |
=
| 12 |
| 25 |
(2)
| 3 |
| 5 |
| 2 |
| 9 |
=
| 2 |
| 15 |
=2;
(3)15÷
| 9 |
| 10 |
| 3 |
| 5 |
=15×
| 10 |
| 9 |
| 3 |
| 5 |
=
| 50 |
| 3 |
| 3 |
| 5 |
=10;
(4)4×
| 5 |
| 12 |
| 5 |
| 9 |
=
| 5 |
| 3 |
| 9 |
| 5 |
=3;
(5)
| 5 |
| 8 |
| 7 |
| 12 |
| 7 |
| 10 |
=
| 5 |
| 8 |
| 12 |
| 7 |
| 10 |
| 7 |
=
| 15 |
| 14 |
| 10 |
| 7 |
=1
| 26 |
| 49 |
(6)
| 1 |
| 2 |
| 5 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 2 |
| 4 |
| 5 |
| 2 |
| 3 |
=
| 2 |
| 5 |
| 2 |
| 3 |
=
| 4 |
| 15 |
点评:此题主要考查的是分数的四则混合运算.
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