题目内容
计算:
(1)
×
×
-
(2)
×(1.25-
)÷
.
(1)
| 3 |
| 4 |
| 5 |
| 6 |
| 4 |
| 5 |
| 1 |
| 2 |
(2)
| 8 |
| 9 |
| 3 |
| 4 |
| 2 |
| 3 |
分析:(1)按照从左到右的顺序求解;
(2)先算小括号里面的减法,再算括号外的乘法,最后算除法.
(2)先算小括号里面的减法,再算括号外的乘法,最后算除法.
解答:解:(1)
×
×
-
,
=
×
-
,
=
-
,
=0;
(2)
×(1.25-
)÷
,
=
×
÷
,
=
×
,
=
.
| 3 |
| 4 |
| 5 |
| 6 |
| 4 |
| 5 |
| 1 |
| 2 |
=
| 5 |
| 8 |
| 4 |
| 5 |
| 1 |
| 2 |
=
| 1 |
| 2 |
| 1 |
| 2 |
=0;
(2)
| 8 |
| 9 |
| 3 |
| 4 |
| 2 |
| 3 |
=
| 8 |
| 9 |
| 1 |
| 2 |
| 2 |
| 3 |
=
| 4 |
| 9 |
| 3 |
| 2 |
=
| 2 |
| 3 |
点评:本题考查了简单的四则混合运算,关键是理清楚运算的顺序,然后根据运算顺序逐步求解即可.
练习册系列答案
相关题目