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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 568 · 40 sums
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.275 + 272 =
  2. 2.A train has 323 people in the front coaches and 493 people in the back coaches. How many people are on the train?
  3. 3.A school has 351 children. 304 of them are girls. How many boys are there?
  4. 4.920 − ? = 509
  5. 5.A school has 465 children. 267 of them are girls. How many boys are there?
  6. 6.292 + 210 =
  7. 7.372 − ? = 253
  8. 8.A school has 675 children. 315 of them are girls. How many boys are there?
  9. 9.A train has 400 people in the front coaches and 452 people in the back coaches. How many people are on the train?
  10. 10.A train has 273 people in the front coaches and 627 people in the back coaches. How many people are on the train?
  11. 11.A train has 315 people in the front coaches and 364 people in the back coaches. How many people are on the train?
  12. 12.168 + 334 =
  13. 13.A school has 644 children. 612 of them are girls. How many boys are there?
  14. 14.510 + 316 =
  15. 15.750 + 133 =
  16. 16.463 − ? = 93
  17. 17.426 − 288 =
  18. 18.A school has 207 children. 116 of them are girls. How many boys are there?
  19. 19.346 + 535 =
  20. 20.? + 566 = 758
  21. 21.? − 413 = 116
  22. 22.265 − 165 =
  23. 23.? − 222 = 334
  24. 24.467 − ? = 314
  25. 25.? + 598 = 914
  26. 26.813 + 164 =
  27. 27.135 + ? = 371
  28. 28.991 − ? = 243
  29. 29.? + 577 = 814
  30. 30.171 + 446 =
  31. 31.831 + 161 =
  32. 32.A train has 211 people in the front coaches and 219 people in the back coaches. How many people are on the train?
  33. 33.652 + ? = 848
  34. 34.603 − 194 =
  35. 35.A train has 374 people in the front coaches and 188 people in the back coaches. How many people are on the train?
  36. 36.836 + ? = 944
  37. 37.? − 811 = 175
  38. 38.428 − 128 =
  39. 39.448 − 440 =
  40. 40.812 + 166 =

Answer key

  1. 547
  2. 816
  3. 47
  4. 411
  5. 198
  6. 502
  7. 119
  8. 360
  9. 852
  10. 900
  11. 679
  12. 502
  13. 32
  14. 826
  15. 883
  16. 370
  17. 138
  18. 91
  19. 881
  20. 192
  21. 529
  22. 100
  23. 556
  24. 153
  25. 316
  26. 977
  27. 236
  28. 748
  29. 237
  30. 617
  31. 992
  32. 430
  33. 196
  34. 409
  35. 562
  36. 108
  37. 986
  38. 300
  39. 8
  40. 978

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