Given:
Addition and subtraction of integers.
To find:
The value of each expression.
Solution:
We know that,
Adding Integers :
1) 85+ (-96) = 85 - 96 = -11
2) 80 + 57 = 137
3) 86 + (-38) = 86 - 38 = 48
4) 22 + (-41) = 22 - 41 = -19
5) -18 + (-45) = -18 - 45 = -63
6) -32 + 48 = 16
7) 6+ (-33) = 6 - 33 = -27
8) 6 + (-47) = 6 - 47 = -41
9) (-78) + 69 = -78 + 69 = -9
10) -72 + (-30) + 10 = -72 - 30 + 10
= -102 + 10
= -92
11) -83 + (-36) + 20 = -83 - 36 + 20
= -119 + 20
= -99
Subtracting Integers :
1) 1-3 = -2
2) 2-(-5) = 2 + 5 = 7
3) 6-(-9) = 6 +9 =15
4) -7 - (-1) = -7 + 1 = -6
5) -7 - 4 = -11
6) 3- (-2) = 3 + 2 = 5
7) 1-9 = -8
8) 2-9 = -7
9) -8 - (-1) = -8 + 1 = -7