write all the formulas you know from the chapter integers
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Rule 1. If Sign is same add the numbers irrespective of their sign and put the sign of greater number
Ex1 : 7 + 5 = +12
Ex2 : - 7 - 5 = -12
Rule 2. If sign are different then find the difference of the two numbers and put the sign of greater number
Ex3 : 7 - 5 = +2
Ex4 : - 7 + 5� = -2
Other example of subtraction
7 - (-5) = 7 + 5 = 12
5 - (-7) = 5 + 7 = 12
- (-5) - (-7) = 5 + 7 = 12
Ex1 : 7 + 5 = +12
Ex2 : - 7 - 5 = -12
Rule 2. If sign are different then find the difference of the two numbers and put the sign of greater number
Ex3 : 7 - 5 = +2
Ex4 : - 7 + 5� = -2
Other example of subtraction
7 - (-5) = 7 + 5 = 12
5 - (-7) = 5 + 7 = 12
- (-5) - (-7) = 5 + 7 = 12
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