题目内容
计算下面各题
|
| ||||||||||||
|
|
分析:(1)先算除法,再算乘法;
(2)先算小括号里面的除法,再算括号外面的除法;
(3)先算减法,再算乘法;
(4)根据乘法分配律进行计算.
(2)先算小括号里面的除法,再算括号外面的除法;
(3)先算减法,再算乘法;
(4)根据乘法分配律进行计算.
解答:解:
(1)
÷
×
,
=
×
,
=
;
(2)
÷(
÷
),
=
÷
,
=
;
(3)
×(
-
),
=
×
,
=
;
(4)
×32+32×
,
=(
+
)×32,
=1×32
=32.
(1)
| 5 |
| 8 |
| 3 |
| 4 |
| 9 |
| 25 |
=
| 5 |
| 6 |
| 9 |
| 25 |
=
| 3 |
| 10 |
(2)
| 1 |
| 56 |
| 3 |
| 14 |
| 6 |
| 13 |
=
| 1 |
| 56 |
| 13 |
| 28 |
=
| 1 |
| 26 |
(3)
| 3 |
| 10 |
| 5 |
| 7 |
| 10 |
| 21 |
=
| 3 |
| 10 |
| 5 |
| 21 |
=
| 1 |
| 14 |
(4)
| 7 |
| 16 |
| 9 |
| 16 |
=(
| 7 |
| 16 |
| 9 |
| 16 |
=1×32
=32.
点评:完成本题要注意分析算式中数据,运用合适的简便方法计算.
练习册系列答案
相关题目
用竖式计算下面各题
| 58×9= | 427×3= | 618÷3= | 8×67= | 650÷5= | 872÷4= |