问题 解答题
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
答案

(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

单项选择题
单项选择题