题目内容
用递等式计算.
×
×
×15÷
÷
÷
×
.
| 6 |
| 7 |
| 35 |
| 12 |
| 6 |
| 5 |
| 11 |
| 35 |
| 22 |
| 7 |
| 13 |
| 16 |
| 3 |
| 4 |
| 26 |
| 3 |
| 8 |
| 5 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)直接约分计算即可;
(2)把除法化成乘法,再约分计算即可;
(3)把除法化成乘法,再约分计算即可.
(2)把除法化成乘法,再约分计算即可;
(3)把除法化成乘法,再约分计算即可.
解答:
解:(1)
×
×
=
=3;
(2)
×15÷
=
×15×
=
=
;
(3)
÷
÷
×
=
×
×
×
=
=
.
| 6 |
| 7 |
| 35 |
| 12 |
| 6 |
| 5 |
=
| 6×35×6 |
| 7×12×5 |
=3;
(2)
| 11 |
| 35 |
| 22 |
| 7 |
=
| 11 |
| 35 |
| 7 |
| 22 |
=
| 11×15×7 |
| 35×22 |
=
| 3 |
| 2 |
(3)
| 13 |
| 16 |
| 3 |
| 4 |
| 26 |
| 3 |
| 8 |
| 5 |
=
| 13 |
| 16 |
| 4 |
| 3 |
| 3 |
| 26 |
| 8 |
| 5 |
=
| 13×4×3×8 |
| 16×3×26×5 |
=
| 1 |
| 5 |
点评:同级运算,按照从左到右的顺序计算即可,注意要进行约分,把结果化成最简分数.
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