题目内容

能用简便方法的要用简便方法.
①58-16÷
4
5

2
9
-
6
15
×
2
9

③62.5÷2.5÷4
④8160÷24-36×2.536×(
5
6
+
1
12
-
1
3
)
3.5÷[1-(0.4+
1
4
)]
①58-16÷
4
5

=58-20,
=38;

2
9
-
6
15
×
2
9

=(1-
6
15
)×
2
9

=
9
15
×
2
9

=
2
15


③62.5÷2.5÷4,
=62.5÷(2.5×4),
=62.5÷10,
=6.25;

④8160÷24-36×2.5,
=340-90,
=250;

36×(
5
6
+
1
12
-
1
3
)

=36×
5
6
+36×
1
12
-36×
1
3

=30+3-12,
=21;

3.5÷[1-(0.4+
1
4
)]

=3.5÷[1-0.65],
=3.5÷0.35,
=10.
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