题目内容
计算下列各题,能简算的要简算.
×
-
÷5
÷(
+
)×
.
| 6 |
| 5 |
| 6 |
| 7 |
| 6 |
| 7 |
| 7 |
| 4 |
| 2 |
| 3 |
| 1 |
| 2 |
| 4 |
| 5 |
分析:(1)先将除法改成乘法,然后运用乘法分配律解答,
(2)先算小括号里面的,最后算括号外面的解答.
(2)先算小括号里面的,最后算括号外面的解答.
解答:解:
×
-
÷5
=
×
-
×
,
=
×(
-
),
=
;
÷(
+
)×
=
÷(
+
)×
,
=
÷
×
,
=
×
×
,
=
.
| 6 |
| 5 |
| 6 |
| 7 |
| 6 |
| 7 |
=
| 6 |
| 5 |
| 6 |
| 7 |
| 6 |
| 7 |
| 1 |
| 5 |
=
| 6 |
| 7 |
| 6 |
| 5 |
| 1 |
| 5 |
=
| 6 |
| 7 |
| 7 |
| 4 |
| 2 |
| 3 |
| 1 |
| 2 |
| 4 |
| 5 |
=
| 7 |
| 4 |
| 4 |
| 6 |
| 3 |
| 6 |
| 4 |
| 5 |
=
| 7 |
| 4 |
| 7 |
| 6 |
| 4 |
| 5 |
=
| 7 |
| 4 |
| 6 |
| 7 |
| 4 |
| 5 |
=
| 6 |
| 5 |
点评:本题主要考查学生依据四则运算计算方法,依据正确选择并运用简便算法解决问题的能力.
练习册系列答案
相关题目