题目内容

脱式计算.
3.5×0.8+5.5×80%
1.25×0.32×25
4
5
-
5
4
×0.4)÷
8
15

3
7
-
3
7
÷3.
(1)3.5×0.8+5.5×80%,
=(3.5+5.5)×0.8,
=9×0.8,
=7.2;

(2)1.25×0.32×25
=(1.25×0.8)×(0.4×25),
=1;

(3)(
4
5
-
5
4
×0.4)÷
8
15

=(
4
5
-
1
2
)×
15
8

=
3
10
×
15
8

=
9
16


3
7
-
3
7
÷3,
=3×
7
3
-
3
7
×
1
3

=7-
1
7

=6
6
7
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网