题目内容

脱式计算.(能简算的要简算)
2
5
×
1
4
+
1
4
×
3
5

5
11
+
7
44
)×88
5
8
×
12
31
×
8
5

4
5
×
6
7
×15×21.
(1)
2
5
×
1
4
+
1
4
×
3
5

=(
2
5
+
3
5
)×
1
4

=1×
1
4

=
1
4


(2)(
5
11
+
7
44
)×88
=
5
11
×88+
7
44
×88
=40+14
=54;

(3)
5
8
×
12
31
×
8
5

=(
5
8
×
8
5
)×
12
31

=1×
12
31

=
12
31


(4)
4
5
×
6
7
×15×21
=(
4
5
×15)×(
6
7
×21)
=12×18
=216.
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