Start Practicing
Worksheet: Addition within 20: Counting on a Number Line
Q1:
I start at a number and count forward. Does this represent adding or subtracting?
- Aadding
- Bsubtracting
Q2:
Count on to add.
Find the total.
- A 16
- B 14
- C 15
Q3:
Count on to add.
Amelia started this calculation on a number line. Finish the calculation to find the total.
- A 18
- B 16
- C 17
Q4:
Count on to add.
Find the total.
- A 12
- B 13
- C 14
Q7:
On this number line, Sophia started at 4 and counted forward three times.
Which of these describes what Sophia did?
- Aadded seven
- Btook away three
- Ctook away seven
- Dadded three
- Eadded four
Q10:
Find the number sentence that matches this number line.
- A3 + 3 = 8
- B3 + 4 = 8
- C8 − 5 = 3
- D3 + 5 = 8
- E8 − 4 = 4
Q11:
Fill in the missing number.
Use the number line if you need to.
Q12:
Fill in the missing number.
Use the number line if you need to.
Q14:
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 .