题目内容
怎样算简便就怎样算
(1)
|
(2)1-
|
(3)(
|
(4)
|
分析:(1)(4)按照从左到右的顺序计算;
(2)先算除法,再算减法;
(3)先算小括号里面的减法,再算括号外的乘法.
(2)先算除法,再算减法;
(3)先算小括号里面的减法,再算括号外的乘法.
解答:解:(1)
×8÷
,
=
÷
,
=2;
(2)1-
÷
,
=1-
,
=
;
(3)(
-
)×
,
=
×
,
=
;
(4)
÷
÷
,
=
×
,
=
.
| 1 |
| 5 |
| 4 |
| 5 |
=
| 8 |
| 5 |
| 4 |
| 5 |
=2;
(2)1-
| 7 |
| 9 |
| 7 |
| 8 |
=1-
| 8 |
| 9 |
=
| 1 |
| 9 |
(3)(
| 5 |
| 6 |
| 2 |
| 3 |
| 9 |
| 10 |
=
| 1 |
| 6 |
| 9 |
| 10 |
=
| 3 |
| 20 |
(4)
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
=
| 9 |
| 10 |
| 8 |
| 7 |
=
| 36 |
| 35 |
点评:此题主要考查分数的四则混合运算,找清楚运算顺序,根据运算顺序逐步求解即可.
练习册系列答案
相关题目