题目内容

耐心算一算
(1)(-3)+(-4)-(+11)-(-19);
(2)-3.5÷
7
8
×(-
8
7
)×|-
3
64
|;
(3)(
3
8
-
2
3
+
1
2
)×(-48);
(4)-12-(1-0.5)×
1
3
×[2-(-3)2].
(1)原式=-3-4-11+19
=-18+19
=1;

(2)原式=
7
2
×
8
7
×
8
7
×
3
64

=
3
14


(3)原式=-
3
8
×48+
2
3
×48-
1
2
×48
=-18+32-24
=-42+32
=-10;

(4)原式=-1-
1
2
×
1
3
×[2-9].
=-1+-
1
2
×
1
3
×[-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