Question

Consider the subtraction expression 9 + (–10) on the number line shown. Explain how you would evaluate the expression on the number line.

A. Begin at 10 and move 9 units to the left
B. Begin at 10 and move 9 units to the right
C. Begin at 9 and move 10 units to the right
D. Begin at 9 and move 10 units to the left

Answer 1

9+(-10) is the same as saying 9-10.

You would start at your fires number, 9.

When subtracting you move to the left.

Start at 9 and move 10 units left. D

The answer is D