题目内容

请你计算(要注意符号和检查)
(1)(-53)+(+21)-(-69)-(+37)
(2)-
7
12
+
6
11
-
5
12
+
5
11

(3)[(-7)-(-10)]-(-8)
(4)-0.5+(-15
1
3
)-(-17.5)-|-12
2
3
|

(5)(-3)×(-
7
5
)×(-
1
3
4
7
(1)(-53)+(+21)-(-69)-(+37)=-53+21+69-37=0;
(2)-
7
12
+
6
11
-
5
12
+
5
11
=-
7
12
-
5
12
+
6
11
+
5
11
=0;
(3)[(-7)-(-10)]-(-8)=3-(-8)=11;
(4)-0.5+(-15
1
3
)-(-17.5)-|-12
2
3
|
=-0.5+17.5-15
1
3
-12
2
3
=17-28=-11;
(5)(-3)×(-
7
5
)×(-
1
3
4
7
=-
7
5
×
4
7
=-
4
5
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