题目内容

计算,能简便的用简便方法算.
8
13
÷24-
1
24
×
5
13
17
21
×13+8÷
21
17
5
18
÷[
5
6
-(
3
8
+
1
4
)]
9.75-(2.75+3.38)-2.62.
(1)
8
13
÷24-
1
24
×
5
13

=
8
13
×
1
24
-
1
24
×
5
13

=(
8
13
-
5
13
)×
1
24

=
3
13
×
1
24

=
1
104


(2)
17
21
×13+8÷
21
17

=
17
21
×13+8×
17
21

=
17
21
×(13+8),
=
17
21
×21,
=17;

(3)
5
18
÷[
5
6
-(
3
8
+
1
4
)],
=
5
18
÷[
5
6
-
5
8
],
=
5
18
÷
5
24

=
4
3


(4)9.75-(2.75+3.38)-2.62,
=9.75-2.75-3.38-2.62,
=(9.75-2.75)-(3.38+2.62),
=7-6,
=1.
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