Success Homeschool

Primary 3 Mathematics · Adding and subtracting larger numbers

Name: ______________________

Date: ____________

1. What is 34 + 25?
- ☐ (a) 59
- ☐ (b) 69
- ☐ (c) 49
- ☐ (d) 509
2. What is 156 + 230?
3. What is 82 − 37?
4. Which addition checks that 145 − 62 = 83?
- ☐ (a) 145 + 62 = 207
- ☐ (b) 83 + 62 = 145
- ☐ (c) 83 − 62 = 21
- ☐ (d) 145 + 83 = 228
5. What is 48 + 36?
- ☐ (a) 74
- ☐ (b) 714
- ☐ (c) 84
- ☐ (d) 82
6. A library has 425 books. 140 books are borrowed. How many books are still on the shelves?
7. Which jumps on a number line correctly work out 67 + 25?
- ☐ (a) 67 + 20 = 87, then 87 + 5 = 92
- ☐ (b) 67 + 20 = 87, then 87 + 5 = 82
- ☐ (c) 67 + 2 = 69, then 69 + 5 = 74
- ☐ (d) 67 + 25 = 812
8. A family drives 268 km on Saturday and 315 km on Sunday. How far do they drive altogether?

Answer sheet

1. 59 — 30 + 20 = 50 and 4 + 5 = 9, so 50 + 9 = 59.
2. 386 — 100 + 200 = 300, 50 + 30 = 80, 6 + 0 = 6. So 300 + 80 + 6 = 386.
3. 45 — Jump back 30 from 82 to 52, then back 7 to 45. Check: 45 + 37 = 82.
4. 83 + 62 = 145 — Adding the answer back to the number taken away should give the starting number: 83 + 62 = 145.
5. 84 — 40 + 30 = 70 and 8 + 6 = 14. Then 70 + 14 = 84.
6. 285 — 425 − 100 = 325, then 325 − 40 = 285. Check: 285 + 140 = 425.
7. 67 + 20 = 87, then 87 + 5 = 92 — Jump 20 from 67 to 87, then 5 more to 92. So 67 + 25 = 92.
8. 583 km — 200 + 300 = 500, 60 + 10 = 70, 8 + 5 = 13. Then 500 + 70 + 13 = 583 km.