# 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.

Q1:

Find the number sentence that matches this number line.

• A9 − 7 = 2
• B9 − 6 = 2
• C2 + 7 = 9
• D2 + 6 = 9
• E9 − 5 = 2

Q2:

Fill in the missing number.

Use the number line if you need to.

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

Q4:

Count back to subtract.

Find the difference.

Q5:

Count back to subtract.

Find the difference.

• A7
• B8
• C6

Q6:

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

• Asubtracting

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
• 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

Q10:

Use the number line to complete the following subtraction sentence.

Q11:

Fill in the missing number.

Use the number line if you need to.

Q12:

Fill in the blanks in the figure below from left to right.

• A6, 2, 7
• B8, 3, 8
• C6, 2, 4
• D8, 3, 7
• E8, 3, 0

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

Q14:

Fill in the missing number.

Use the number line if you need to.

Q15:

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

Remember: Count back to subtract.