Operations with Integers: Adding and Subtracting

 $-7+8=$  

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When ADDing two integers with the SAME SIGN...

• Add and keep the same sign.

• Add and change the sign.

• Subtract and keep the same sign.

• Subtract and change the sign.

12 + (-9)=_______

10 + (-3) =

• 13

• -7

• -13

• 7

 $\left(-11\right)-\left(-9\right)$  =________

 $-12-2+\left(-4\right)-2+\left(-20\right)$