Evaluate: 170-(-77)

What is the sum of -15 and 32? 

Evaluate:10-8

What is the sum of -50 and 28? 

Evaluate:-50-25

What is the sum of 10 and 13?

What is the sum of 27 and 38? 

What is the sum of -25 and -19? 

Evaluate:30-(-28)

Evaluate:-30-(-10)