问题 解答题
计算下列各题:
(1)(+10
1
3
)+(-11.5)+(-10
1
3
)-(+4.5);
(2)(-81)÷
9
4
×
4
9
÷(-16);
(3)-32-[-5-0.2÷
4
5
×(-2)2];
(4)24×(
1
6
-
3
4
-
5
8
)+(-
1
3
2÷(-
1
72
).
答案

(1)(+10

1
3
)+(-11.5)+(-10
1
3
)-(+4.5)

=10

1
3
-11.5-10
1
3
-4.5

=10

1
3
-10
1
3
-11.5-4.5

=-16;

(2)(-81)÷

9
4
×
4
9
÷(-16)

=(-81)×

4
9
×
4
9
÷(-16)

=-16÷(-16)

=1;

(3)-32-[-5-0.2÷

4
5
×(-2)2]

=-9-[-5-

1
5
×
5
4
×4]

=-9-[-5-1]

=-9+6

=-3;

(4)24×(

1
6
-
3
4
-
5
8
)+(-
1
3
2÷(-
1
72

=24×

1
6
-24×
3
4
-24×
5
8
+
1
9
×(-72)

=4-18-15-8

=4-41

=-37.

判断题
单项选择题