问题 解答题
计算.
(1)0-(-3).                    
(2)(-16)-(-18)-(-12)-24;
(3)23-36-(-76)-(-105);      
(4)(-32)-87-(-72)-(-27).
(5)2.75-(-8.5)-1.5-2.75.  
(6)(-
2
3
)-(-1
3
4
)-(-1
2
3
)-(+1.75)

(7)|-23|-(-15)-|4
1
3
-(-2
2
3
)|
答案

(1)原式=0+3

=3;

(2)原式=(-16)+18+12+(-24)

=-16+18+12-24

=10;

(3)原式=23+(-36)+76+105

=23+76+105-36

=168;

(4)原式=(-32)+(-87)+72+27

=-119+99

=-20;

(5)原式=2.75+8.5-1.5-2.75

=11.25-4.25

=7;

(6)原式=-

2
3
+1
3
4
+1
2
3
-1.75

=1;

(7)原式=23+15-9

=31.

单项选择题 A2型题
单项选择题