Grade 3 Facts to 20 worksheet
from Gradelings · Name: ______________________
How to explain it
- Use doubles you know: 5 + 5 = 10.
- Near doubles: 5 + 6 is one more than 5 + 5.
- For subtraction, think of the missing addend: 12 − 6 is 6 + ☐ = 12.
Example: 5 + 5 = 10. So what is 5 + 6? 6 is one more than 5. So the answer is one more than 10: 11. Answer: 11
Question 1
What is 8 + 4?
8 + 4 = ?
answer box
12
Hint: Make a ten: 8 + 2 = 10. Then add the 2 left over: 10 + 2 = 12.
Question 2
What is 8 + 9?
8 + 9 = ?
- 7
- 17
- 16
- 18
17
Hint: Use a double: 8 + 8 = 16, and 1 more makes 17.
Question 3
Make a ten! What number goes in the box?
8 + 8 = 10 +
- 6
- 5
- 8
- 7
6
Hint: 8 needs 2 more to make 10. Take 2 from 8, and 6 is left over.
Question 4
What is 14 − 7?
14 − 7 = ?
- 7
- 6
- 10
- 8
7
Hint: Take away 4 to get to 10, then take away 3 more: 10 − 3 = 7. Or think 7 + ? = 14.
Question 5
What is 12 − 4?
12 − 4 = ?
answer box
8
Hint: Take away 2 to get to 10, then take away 2 more: 10 − 2 = 8. Or think 4 + ? = 12.
Question 6
A plate has 15 cookies. The family eats 7. How many cookies are left?
🍪answer box
8
Hint: Take away: 15 − 7. Take away 5 to get to 10, then take away 2 more: 10 − 2 = 8. Or think 7 + ? = 15.
Question 7
8 + 8 = 16. So what is 8 + 9?
8 + 9 = ?
- 15
- 19
- 16
- 17
17
Hint: Use the double 8 + 8 = 16. 8 + 9 is 1 more, so it's 17.
Question 8
Which fact is in the same family as 2 + 9 = 11?
2 + 9 = 11
- 11 + 2 = 13
- 11 − 9 = 2
- 9 − 2 = 7
- 11 − 3 = 8
11 − 9 = 2
Hint: A fact family uses the same three numbers: 2, 9 and 11. Find the fact that uses only those numbers.
Question 9
3 + 3 = 6. So what is 3 + 4?
3 + 4 = ?
- 5
- 7
- 9
- 6
7
Hint: Use the double 3 + 3 = 6. 3 + 4 is 1 more, so it's 7.
Question 10
What is 9 + 2?
9 + 2 = ?
- 10
- 11
- 1
- 12
11
Hint: Make a ten: 9 + 1 = 10. Then add the 1 left over: 10 + 1 = 11.
Answer key
- 1. 12
- 2. 17
- 3. 6
- 4. 7
- 5. 8
- 6. 8
- 7. 17
- 8. 11 − 9 = 2
- 9. 7
- 10. 11
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