题目内容
计算下面各题
|
| 1-
| ||||||||||||
|
| 0.8÷
|
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)(2)约分计算;
(3)从左往右以此计算;
(4)调整运算顺序,使计算简便;
(5)(6)把除法变为乘法计算.
(3)从左往右以此计算;
(4)调整运算顺序,使计算简便;
(5)(6)把除法变为乘法计算.
解答:
解:(1)
×
=
(2)
×
=
(3)1-
-
=
-
=
(4)
×
÷
×
=(
÷
)×(
×
)
=1×
=
(5)
÷14
=
×
=
(6)0.8÷
=
×
=
| 11 |
| 15 |
| 25 |
| 44 |
| 5 |
| 12 |
(2)
| 25 |
| 39 |
| 13 |
| 50 |
| 1 |
| 6 |
(3)1-
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 6 |
(4)
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
=(
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
=1×
| 1 |
| 9 |
=
| 1 |
| 9 |
(5)
| 7 |
| 11 |
=
| 7 |
| 11 |
| 1 |
| 14 |
=
| 1 |
| 22 |
(6)0.8÷
| 13 |
| 16 |
=
| 4 |
| 5 |
| 16 |
| 13 |
=
| 64 |
| 65 |
点评:考查了分数的四则混合运算,注意运算顺序和运算法则,以及数字转化.
练习册系列答案
相关题目
下列算式中,与
×3的结果不相同的算式是( )
| 4 |
| 9 |
A、
| ||||
B、(
| ||||
C、
|