For any positive numbers x and y, -x + -y =
x + y
x - y
-x + y
-(x + y)
For any positive numbers x and y, x + (-y) =
x.y
x/y
-12 + 8 =
20
-20
4
-4
-5 - 6 =
-11
11
1
-1
If the temperature is -5oC and it increases by 7oC. What is the present temperature?
12oC
2oC
3oC
5oC
____ - 10 = 8
2
-2
18
-18
6/7
-6/7
2/7
-2/7
Difference between 15 and 7 is.
7
6
8
9
I had 25 sweets with me. I give 10 of them to my friend. How many sweets are left with me.
15
10
5
2 -12 =
12
14
-10