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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 813 · 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. 1.590 + 214 =
  2. 2.? + 355 = 560
  3. 3.? − 639 = 289
  4. 4.694 − 227 =
  5. 5.308 − 268 =
  6. 6.871 − 363 =
  7. 7.? + 656 = 822
  8. 8.? − 126 = 215
  9. 9.798 + 136 =
  10. 10.A train has 384 people in the front coaches and 498 people in the back coaches. How many people are on the train?
  11. 11.637 + 102 =
  12. 12.A school has 465 children. 297 of them are girls. How many boys are there?
  13. 13.837 + 118 =
  14. 14.382 − 115 =
  15. 15.A train has 369 people in the front coaches and 204 people in the back coaches. How many people are on the train?
  16. 16.829 + 119 =
  17. 17.900 − 404 =
  18. 18.? − 141 = 145
  19. 19.883 + 116 =
  20. 20.A train has 356 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  21. 21.705 − ? = 396
  22. 22.A train has 782 people in the front coaches and 193 people in the back coaches. How many people are on the train?
  23. 23.302 + 200 =
  24. 24.A train has 396 people in the front coaches and 536 people in the back coaches. How many people are on the train?
  25. 25.A train has 796 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  26. 26.999 − ? = 895
  27. 27.A school has 617 children. 358 of them are girls. How many boys are there?
  28. 28.679 + 106 =
  29. 29.820 + ? = 931
  30. 30.? − 322 = 305
  31. 31.A school has 481 children. 130 of them are girls. How many boys are there?
  32. 32.661 + 136 =
  33. 33.352 − 307 =
  34. 34.601 + 275 =
  35. 35.380 + 247 =
  36. 36.552 + 345 =
  37. 37.A school has 460 children. 402 of them are girls. How many boys are there?
  38. 38.? + 144 = 441
  39. 39.A train has 194 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  40. 40.A train has 500 people in the front coaches and 100 people in the back coaches. How many people are on the train?

Answer key

  1. 804
  2. 205
  3. 928
  4. 467
  5. 40
  6. 508
  7. 166
  8. 341
  9. 934
  10. 882
  11. 739
  12. 168
  13. 955
  14. 267
  15. 573
  16. 948
  17. 496
  18. 286
  19. 999
  20. 515
  21. 309
  22. 975
  23. 502
  24. 932
  25. 944
  26. 104
  27. 259
  28. 785
  29. 111
  30. 627
  31. 351
  32. 797
  33. 45
  34. 876
  35. 627
  36. 897
  37. 58
  38. 297
  39. 353
  40. 600

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