To add 2 integers with different sign you

To add integers with different signs, keep the sign of the number with the largest absolute value and subtract the smallest absolute value from the largest.

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To add integers having the same sign, keep the same sign and add the absolute value of each number.

abde or 1,2,4, 5 is the answer

step-by-step explanation:

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: