题目内容

计算(1)(-
1
2
)-(-3
1
4
)+(+2
3
4
)-(+5
1
2
)

(2)(-6)÷(-0.25)×
11
24

(3)-2+(1-0.2÷
3
5
)×(-3)

(4)-14-
1
6
×[2-(-3)2]
(1)(-
1
2
)-(-3
1
4
)+(+2
3
4
)-(+5
1
2
)

=(-
1
2
)+3
1
4
+2
3
4
+(-5
1
2
)

=[(-
1
2
)+(-5
1
2
)]+(3
1
4
+2
3
4

=(-6)+6
=0; 

(2)(-6)÷(-0.25)×
11
24

=(-6)×(-4)×
11
24

=24×
11
24

=11;

(3)-2+(1-0.2÷
3
5
)×(-3)

=-2+(1-
1
5
×
5
3
)×(-3)
=-2+
2
3
×(-3)
=-2+(-2)
=-4;

(4)-14-
1
6
×[2-(-3)2]
=-1-
1
6
×[2+(-9)]
=-1-
1
6
×(-7)
=-1+
7
6

=
1
6
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