# Worksheet: Subtracting Numbers up to 20 on a Number Line

In this worksheet, we will practice subtracting within 20 by jumping backward in ones on a number line.

**Q3: **

On this number line, Daniel started at 20 and counted backward until he reached 15.

Which number sentence describes what Daniel did?

- A20 − 5 = 15
- B20 − 2 = 15
- C20 − 4 = 15
- D20 − 3 = 15
- E20 − 1 = 15

**Q6: **

I start at a number and count backward. Does this represent adding or subtracting?

- Asubtracting
- Badding

**Q7: **

On this number line, Ethan started at 5 and counted back three. Which of these describes what Ethan did?

- Atook away one
- Btook away two
- Cadded two
- Dadded three
- Etook away three

**Q8: **

Noah was playing a game. First, he moved his counter 8 spaces forward. Then, he moved it 3 spaces backward.

How many spaces from the start is his counter?

**Q9: **

Count back to subtract.

Find the difference.

- A9
- B6
- C1

**Q11: **

Fill in the missing number.

Use the number line if you need to.

**Q13: **

We can subtract numbers on number lines by thinking about length.

Scarlett put a bar of length 10 on the number line and took away a bar of length 4 to see how much was left.

Read how she showed this on the number line.

Write an equation to show what she did.

- A
- B
- C

**Q15: **

Liam started his calculation on the number line. Help him finish it to find the difference.

Remember: Count back to subtract.