题目内容
脱式计算.
(1)35÷(
÷
)
(2)
-
×
(3)
×
÷
.
(1)35÷(
| 6 |
| 5 |
| 3 |
| 7 |
(2)
| 3 |
| 8 |
| 3 |
| 10 |
| 5 |
| 6 |
(3)
| 5 |
| 9 |
| 6 |
| 25 |
| 3 |
| 10 |
分析:(1)先算括号内的,再算括号外的;
(2)先算乘法,再算减法;
(3)把除法改为乘法,约分计算.
(2)先算乘法,再算减法;
(3)把除法改为乘法,约分计算.
解答:解:(1)35÷(
÷
),
=35÷(
×
),
=35÷
,
=35×
,
=
;
(2)
-
×
,
=
-
,
=
;
(3)
×
÷
,
=
×
×
,
=
.
| 6 |
| 5 |
| 3 |
| 7 |
=35÷(
| 6 |
| 5 |
| 7 |
| 3 |
=35÷
| 14 |
| 5 |
=35×
| 5 |
| 14 |
=
| 25 |
| 2 |
(2)
| 3 |
| 8 |
| 3 |
| 10 |
| 5 |
| 6 |
=
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 8 |
(3)
| 5 |
| 9 |
| 6 |
| 25 |
| 3 |
| 10 |
=
| 5 |
| 9 |
| 6 |
| 25 |
| 10 |
| 3 |
=
| 4 |
| 9 |
点评:此题考查了分数的四则混合运算,注意运算顺序和运算法则.
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