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-8-(-3)=?
7-(-8)=?

Step-by-step explanation:

In integer subtraction, find the additive inverse of the second number and then add.

Here additive inverse of (-3) is 3.

-8 - (-3) = -8 + 3

           = (-5)

If two numbers are opposite sign, subtract and the result will have the sign of the bigger number. Here the sign of bigger number (8) is negative.

7- (-8)

Here additive inverse of (-8) is 8

7 - (-8) = 7 + 8 = 15

2+2 obliviously is 4.