In this worksheet, we will practice adding within 20 by counting on a number line and writing addition sentences describing jumps on the number line.

**Q3: **

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

- Aadding
- Bsubtracting

**Q7: **

On this number line, Amira started at 4 and counted forward three times.

Which of these describes what Amira did?

- Aadded seven
- Btook away three
- Ctook away seven
- Dadded three
- Eadded four

**Q8: **

Find the number sentence that matches this number line.

- A3 + 3 = 8
- B3 + 4 = 8
- C8 − 5 = 3
- D3 + 5 = 8
- E8 − 4 = 4

**Q9: **

Fill in the missing number.

Use the number line if you need to.

**Q10: **

Fill in the missing number.

Use the number line if you need to.

**Q12: **

To find the sum of , we can use a number line.

- Start at 11
- Count on 6
- Land on 17

So, we now know that .

Use a number line to find the sum of .

**Q13: **

Count on to add.

Dina started this calculation on a number line. Finish the calculation to find the total.

- A 18
- B 16
- C 17