Question

81-(-42)=

Answer 1

123

Answer 2

When you subtract a negative it cancels out and turns into a positive, so it is 81+42=123

Answer 3

imagine that a negative sign just turns the direction you are traveling on the number line. normally positive is right and negative is left. so when you subtract, you go left, but if you subtract a negative number, you go left then turn around again to go right.

aka when you subtract a negative, you add