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Worksheet: Addition within 20 by Counting on a Number Line
Q6:
Count on to add.
Find the total.
- A 16
- B 14
- C 15
Q7:
Count on to add.
Find the total.
- A 12
- B 13
- C 14
Q8:
On this number line, Sophia started at 4 and counted forward three.
Which of the following describes what Sophia did?
- AShe added seven.
- BShe took away three.
- CShe took away seven.
- DShe added three.
- EShe added four.
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.
Q11:
Count on to add.
Amelia started this calculation on a number line. Finish the calculation to find the total.
Q12:
I start at a number and count forward. Does this represent adding or subtracting?
- Aadding
- Bsubtracting
Q13:
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 .
Q14:
Find the number sentence that matches this number line.
- A3 + 3 = 8
- B3 + 4 = 8
- C8 − 5 = 3
- D3 + 5 = 8
- E8 − 4 = 4