Writing equations

Question

The sum of -38 and 15 is -23 written as an equation

Answer 1

Sum means addition, so the sum of -38 and 15 would be -38 + 15

When you add to a negative you move closer to 0 on the number line so this means that the equation is:

-38 + 15 = -23

Whenever you add you always move to the right on a number line, so if your starting number is negative and you add something to it you move closer to 0.