# 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. Q6:

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

Q7:

On this number line, James started at 5 and counted back three. Which of these describes what James did? • Atook away one
• Btook away two
• Etook away three

Q8:

Count back to subtract.

Find the difference. Q9:

Use the number line to complete the following subtraction sentence.  Q10:

Fill in the missing number. Use the number line if you need to. Q11:

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

Q12:

Fill in the missing number. Use the number line if you need to. Q13:

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

Remember: Count back to subtract. 