Understanding Subtraction on a Number Line

What is the difference between 15 and 13 when using a number line?

• 4

• 1

• 3

• 2

How many hops are there between 19 and 10 on a number line?

• 10

• 9

• 8

• 7

What is the purpose of using different colored lines on a number line?

• To make the number line look colorful

• To represent different numbers

• To confuse the viewer

• To indicate the start and end points