Success Homeschool

Year 3 Mathematics · Addition and subtraction facts

Name: ______________________

Date: ____________

1. What is the missing number? 7 + ? = 15
- ☐ (a) 7
- ☐ (b) 8
- ☐ (c) 9
- ☐ (d) 22
2. What is 9 + 8?
3. Which is the turnaround fact for 6 + 9 = 15?
- ☐ (a) 15 − 6 = 9
- ☐ (b) 9 + 6 = 15
- ☐ (c) 15 − 9 = 6
- ☐ (d) 6 + 15 = 21
4. What is 16 − 7?
5. What is the missing number? 13 − ? = 5
- ☐ (a) 18
- ☐ (b) 7
- ☐ (c) 9
- ☐ (d) 8
6. Leo had 11 marbles. His sister gave him some more and now he has 18. How many marbles did his sister give him?
7. There were 14 birds on a fence. 6 flew away. Which number sentence matches the story?
- ☐ (a) 14 + 6 = 20
- ☐ (b) 20 − 6 = 14
- ☐ (c) 14 − 6 = 8
8. If 7 + 7 = 14, what is 7 + 8?

Answer sheet

1. 8 — 15 − 7 = 8, and 7 + 8 = 15.
2. 17 — Make ten: move 1 from 8 to 9 to make 10, leaving 7. 10 + 7 = 17.
3. 9 + 6 = 15 — A turnaround swaps the order of the numbers being added: 9 + 6 = 15.
4. 9 — Think addition: 7 + 9 = 16, so 16 − 7 = 9.
5. 8 — 5 + 8 = 13, so 13 − 8 = 5.
6. 7 — 11 + ? = 18. Count on from 11 to 18: that is 7. Check: 11 + 7 = 18.
7. 14 − 6 = 8 — Birds flew away, so we subtract: 14 − 6 = 8.
8. 15 — 8 is one more than 7, so 7 + 8 is one more than 14, which is 15.