Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 299 · 40 sums

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

1. 1.775 − 354 =
2. 2.672 − 269 =
3. 3.264 − 191 =
4. 4.774 − 536 =
5. 5.241 − 115 =
6. 6.151 + 585 =
7. 7.600 + 184 =
8. 8.227 + ? = 767
9. 9.A train has 369 people in the front coaches and 595 people in the back coaches. How many people are on the train?
10. 10.? + 608 = 780
11. 11.? + 885 = 996
12. 12.271 − 230 =
13. 13.759 − ? = 270
14. 14.354 + ? = 555
15. 15.A train has 130 people in the front coaches and 708 people in the back coaches. How many people are on the train?
16. 16.A school has 296 children. 248 of them are girls. How many boys are there?
17. 17.182 + ? = 698
18. 18.? + 883 = 999
19. 19.? + 856 = 967
20. 20.A train has 505 people in the front coaches and 176 people in the back coaches. How many people are on the train?
21. 21.481 + 349 =
22. 22.? + 143 = 293
23. 23.955 − 282 =
24. 24.A school has 392 children. 227 of them are girls. How many boys are there?
25. 25.227 + 100 =
26. 26.? − 130 = 408
27. 27.573 + 171 =
28. 28.114 + 313 =
29. 29.120 + 665 =
30. 30.A school has 368 children. 283 of them are girls. How many boys are there?
31. 31.133 + ? = 245
32. 32.? − 435 = 307
33. 33.217 − 156 =
34. 34.? + 277 = 586
35. 35.608 + 270 =
36. 36.112 + ? = 525
37. 37.289 − 220 =
38. 38.600 − ? = 347
39. 39.? + 274 = 656
40. 40.609 + 151 =

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