题目内容
计算下面各题
|
|
| ||||||||||||||
4÷
|
|
(
|
分析:(1)(2)按照从左到右顺序计算解答,
(3)运用乘法交换律解答,
(4)(5)依据分数除法计算方法解答,
(6)化原式为:(
-
)×
,再运用乘法分配律解答.
(3)运用乘法交换律解答,
(4)(5)依据分数除法计算方法解答,
(6)化原式为:(
| 3 |
| 4 |
| 3 |
| 8 |
| 16 |
| 3 |
解答:解:(1)
×
÷2,
=
÷2,
=
;
(2)
×18×
,
=4×
,
=3;
(3)
÷
×
,
=
×
÷
,
=
÷
,
=
;
(4)4÷
=2
;
(5)
÷
=1
;
(6)(
-
)÷
,
=(
-
)×
,
=
×
-
×
,
=4-2,
=2.
| 3 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 2 |
=
| 1 |
| 4 |
(2)
| 2 |
| 9 |
| 3 |
| 4 |
=4×
| 3 |
| 4 |
=3;
(3)
| 6 |
| 13 |
| 5 |
| 11 |
| 5 |
| 6 |
=
| 6 |
| 13 |
| 5 |
| 6 |
| 5 |
| 11 |
=
| 5 |
| 13 |
| 5 |
| 11 |
=
| 11 |
| 13 |
(4)4÷
| 24 |
| 17 |
| 5 |
| 6 |
(5)
| 6 |
| 13 |
| 9 |
| 26 |
| 1 |
| 3 |
(6)(
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 16 |
=(
| 3 |
| 4 |
| 3 |
| 8 |
| 16 |
| 3 |
=
| 3 |
| 4 |
| 16 |
| 3 |
| 3 |
| 8 |
| 16 |
| 3 |
=4-2,
=2.
点评:本题考查知识点:(1)四则运算计算顺序,(2)分数除法计算方法,(3)简便方法正确运用.
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