题目内容
小小神算手.
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4÷
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考点:分数的四则混合运算
专题:运算顺序及法则
分析:按照从左到右的顺序计算依次计算即可.
解答:
=
×
=
;
(2)
×
×
=
×
=
;
(3)
×
÷
=
×
=
;
(4)4÷
×
=4×
×
=8;
(5)
÷
×
=
×
×
=
;
(6)
÷
÷
=
×
×
=
.
解:(1)
|
| 1 |
| 4 |
| 4 |
| 9 |
=
| 1 |
| 9 |
(2)
| 5 |
| 18 |
| 1 |
| 4 |
| 9 |
| 10 |
=
| 5 |
| 72 |
| 9 |
| 10 |
=
| 1 |
| 16 |
(3)
| 4 |
| 9 |
| 15 |
| 16 |
| 5 |
| 6 |
=
| 5 |
| 12 |
| 6 |
| 5 |
=
| 1 |
| 2 |
(4)4÷
| 7 |
| 20 |
| 7 |
| 10 |
=4×
| 20 |
| 7 |
| 7 |
| 10 |
=8;
(5)
| 6 |
| 13 |
| 5 |
| 11 |
| 5 |
| 6 |
=
| 6 |
| 13 |
| 11 |
| 5 |
| 5 |
| 6 |
=
| 11 |
| 13 |
(6)
| 5 |
| 6 |
| 4 |
| 7 |
| 9 |
| 14 |
=
| 5 |
| 6 |
| 7 |
| 4 |
| 14 |
| 9 |
=
| 245 |
| 108 |
点评:分数乘除混合运算,把除法改为乘法后约分计算得出结果,乘法直接约分计算即可.
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