Lesson Worksheet: Subtracting Numbers up to 20 on a Number Line Mathematics • 1st Grade
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, James started at 5 and counted back three. Which of these describes what James did?
- Atook away one
- Btook away two
- Cadded two
- Dadded three
- Etook away three
Q8:
Count back to subtract.
Find the difference.
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
Q13:
Benjamin started his calculation on the number line. Help him finish it to find the difference.
Remember: Count back to subtract.
