Question

Melody stated that the sum of a positive and a negative integer equals a negative integer or 0.

Use these numbers to answer the questions:

–7, 3, 8, –5, 7



(a) Is this statement always true, sometimes true, or always false? Write three equations to support your answer.

(b) Pretend that you need to explain to a friend what happens how you determine whether a sum will be positive, negative, or 0 when adding a positive and a negative decimal.

Answer 1

(a) I'd say sometimes true. 3 + -7= -4 , -5 + 3= -2 , 8+-5=3, 7+-7=0

(b) I'm not too sure about this one but I what i know is that if the positive number is higher than the negative number it will be a positive. If you are adding both a negative number and a positive number that is the same value it will be 0. And if you are adding a negative that is higher than the positive it will be a negative number.

I hope this helped a bit.. (: