题目内容
计算:(1)3×2
×
×
;
(2)(5
-3
)×(6
-2
×3).
| 2 |
| 5 |
| 1 |
| 4 |
| 1 |
| 2 |
(2)(5
| 1 |
| 13 |
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 4 |
分析:(1)按照从左到右顺序计算,
(2)按照先同时计算括号里面的,再计算括号外面的顺序解答.
(2)按照先同时计算括号里面的,再计算括号外面的顺序解答.
解答:解:(1)3×2
×
×
,
=
×
×
,
=
×
,
=
;
(2)(5
-3
)×(6
-2
×3),
=
×(6
-6
),
=
×0,
=0.
| 2 |
| 5 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 36 |
| 5 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 9 |
| 5 |
| 1 |
| 2 |
=
| 9 |
| 10 |
(2)(5
| 1 |
| 13 |
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 4 |
=
| 177 |
| 104 |
| 3 |
| 4 |
| 3 |
| 4 |
=
| 177 |
| 104 |
=0.
点评:本题主要考查学生依据四则运算顺序正确进行计算的能力,关键是计算结果要准确.
练习册系列答案
相关题目