It helps if you put the positive one first. Then, if you realize that adding a negative is the same as subtracting a positive, the rest is easy.
7 + (-3) = 7 - 3 = 4
3 + (-7) = 3 - 7 = -4
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Adding two numbers with different signs means subtracting the two absolute integers (without sign) and vice versa.
The sign of the sum will be the same as the number with the greatest absolute value. -9 + 4 = -5 -4 + 9 = 5
Just multiply without the sign. Then add a minus sign to the result.
To add two integers with unlike signs: -- Find the difference between their sizes, ignoring their signs. -- Give the difference the sign of the integer with the larger size.
You find their difference. The answer has the sign of the number with the larger absolute value.