题目内容
| 30÷
|
| ||||||||||||||||
|
| 36×(
|
考点:分数的四则混合运算
专题:运算顺序及法则
分析:在根据四则运算的计算顺序进行计算,(1)从左到右依次计算,(2)(3)(4)(5)先把除法转化为乘法,再约分进行计算,(6)根据乘法分配律进行计算,据此解答.
解答:
解:(1)
×
×
=
×
=
;
(2)30÷
×
=30×
×
=
;
(3)
÷8×
=
×
×
=
;
(4)
×
÷
=
×
×
=
;
(5)
×
÷
=
×
×
=
;
(6)36×(
+
)
=36×
+36×
=8+9
=17
| 2 |
| 3 |
| 6 |
| 7 |
| 14 |
| 25 |
=
| 4 |
| 7 |
| 14 |
| 25 |
=
| 8 |
| 25 |
(2)30÷
| 9 |
| 10 |
| 2 |
| 5 |
=30×
| 10 |
| 9 |
| 2 |
| 5 |
=
| 40 |
| 3 |
(3)
| 4 |
| 9 |
| 6 |
| 7 |
=
| 4 |
| 9 |
| 1 |
| 8 |
| 6 |
| 7 |
=
| 1 |
| 21 |
(4)
| 2 |
| 9 |
| 3 |
| 4 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 3 |
| 4 |
| 9 |
| 2 |
=
| 3 |
| 4 |
(5)
| 3 |
| 8 |
| 5 |
| 6 |
| 15 |
| 16 |
=
| 3 |
| 8 |
| 5 |
| 6 |
| 16 |
| 15 |
=
| 1 |
| 3 |
(6)36×(
| 2 |
| 9 |
| 1 |
| 4 |
=36×
| 2 |
| 9 |
| 1 |
| 4 |
=8+9
=17
点评:本题主要考查了学生对分数四则运算计算顺序的掌握,在一个算式中,先算乘除,再算加减,有括号的要先算括号里面的.
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