Let’s go through each problem one by one. These are all about adding a 3-digit number and hundreds — meaning we’re just adding something like 200, 400, 500, etc., to another 3-digit number. The key is to focus on the hundreds place!
---
Problem 1: 125 + 200
- Think: 1 hundred + 2 hundreds = 3 hundreds → 300
- Keep the rest (25) as is → 300 + 25 =
325
✔ Answer: 325
---
Problem 2: 232 + 400
- 2 hundreds + 4 hundreds = 6 hundreds → 600
- Add the 32 → 600 + 32 =
632
✔ Answer: 632
---
Problem 3: 331 + 500
- 3 hundreds + 5 hundreds = 8 hundreds → 800
- Add the 31 → 800 + 31 =
831
✔ Answer: 831
---
Problem 4: 460 + 300
- 4 hundreds + 3 hundreds = 7 hundreds → 700
- Add the 60 → 700 + 60 =
760
✔ Answer: 760
---
Problem 5: 481 + 500
- 4 hundreds + 5 hundreds = 9 hundreds → 900
- Add the 81 → 900 + 81 =
981
✔ Answer: 981
---
Problem 6: 609 + 200
- 6 hundreds + 2 hundreds = 8 hundreds → 800
- Add the 9 → 800 + 9 =
809
✔ Answer: 809
---
Problem 7: 314 + 400
- 3 hundreds + 4 hundreds = 7 hundreds → 700
- Add the 14 → 700 + 14 =
714
✔ Answer: 714
---
Problem 8: 555 + 200
- 5 hundreds + 2 hundreds = 7 hundreds → 700
- Add the 55 → 700 + 55 =
755
✔ Answer: 755
---
Problem 9: 810 + 100
- 8 hundreds + 1 hundred = 9 hundreds → 900
- Add the 10 → 900 + 10 =
910
✔ Answer: 910
---
Problem 10: 176 + 800
- 1 hundred + 8 hundreds = 9 hundreds → 900
- Add the 76 → 900 + 76 =
976
✔ Answer: 976
---
Problem 11: 245 plus 400
Same idea!
2 hundreds + 4 hundreds = 6 hundreds → 600
Add 45 → 600 + 45 =
645
✔ Answer: 645
---
Problem 12: Add 108 to 600
This is 600 + 108
Break it down: 600 + 100 = 700, then +8 =
708
✔ Answer: 708
---
Problem 13: What number added to 300 makes 555?
We need to find: ? + 300 = 555
So subtract: 555 - 300 =
255
Check: 255 + 300 = 555
✔
✔ Answer: 255
---
Problem 14: 135 plus 600
1 hundred + 6 hundreds = 7 hundreds → 700
Add 35 → 700 + 35 =
735
✔ Answer: 735
---
Problem 15: Add 246 to 700
700 + 246
Think: 700 + 200 = 900, then +46 =
946
✔ Answer: 946
---
Final Answer:
1. 325
2. 632
3. 831
4. 760
5. 981
6. 809
7. 714
8. 755
9. 910
10. 976
11. 645
12. 708
13. 255
14. 735
15. 946
Parent Tip: Review the logic above to help your child master the concept of addition worksheet multiples of.
