题目内容
计算下面各题
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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.
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