题目内容

奇思妙算(用简便方法计算下面各题)
(1)
7
8
×
5
6
×
8
7
-
1
3

(2)
7
9
÷2
1
5
+
2
9
×
5
11

(3)(
2
9
×13-
2
9
)÷
1
3
(1)
7
8
×
5
6
×
8
7
-
1
3

=(
7
8
×
8
7
)×
5
6
-
1
3

=1×
5
6
-
1
3

=
5
6
-
1
3

=
1
2


(2)
7
9
÷2
1
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(3))(
2
9
×13-
2
9
)÷
1
3

=(13-1)×
2
9
×3
=12×
2
9
×3
=8
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