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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 286 · 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. 1.406 − 357 =
  2. 2.714 − ? = 104
  3. 3.A train has 284 people in the front coaches and 323 people in the back coaches. How many people are on the train?
  4. 4.A school has 319 children. 134 of them are girls. How many boys are there?
  5. 5.? − 136 = 618
  6. 6.234 − ? = 26
  7. 7.A school has 329 children. 125 of them are girls. How many boys are there?
  8. 8.340 − ? = 119
  9. 9.A train has 838 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  10. 10.178 + ? = 840
  11. 11.? + 120 = 591
  12. 12.A school has 380 children. 342 of them are girls. How many boys are there?
  13. 13.321 + ? = 452
  14. 14.808 − 166 =
  15. 15.A train has 309 people in the front coaches and 273 people in the back coaches. How many people are on the train?
  16. 16.A school has 337 children. 297 of them are girls. How many boys are there?
  17. 17.222 − 129 =
  18. 18.261 + 178 =
  19. 19.903 − 843 =
  20. 20.532 + 355 =
  21. 21.456 − ? = 48
  22. 22.A school has 676 children. 616 of them are girls. How many boys are there?
  23. 23.A train has 116 people in the front coaches and 726 people in the back coaches. How many people are on the train?
  24. 24.533 − 240 =
  25. 25.525 + 391 =
  26. 26.436 + 186 =
  27. 27.554 + 241 =
  28. 28.207 + 741 =
  29. 29.838 + 130 =
  30. 30.439 + ? = 711
  31. 31.? − 499 = 317
  32. 32.A school has 876 children. 753 of them are girls. How many boys are there?
  33. 33.A school has 629 children. 473 of them are girls. How many boys are there?
  34. 34.A school has 938 children. 312 of them are girls. How many boys are there?
  35. 35.A train has 206 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  36. 36.439 − ? = 149
  37. 37.198 + ? = 368
  38. 38.270 − 107 =
  39. 39.215 − 149 =
  40. 40.A train has 613 people in the front coaches and 222 people in the back coaches. How many people are on the train?

Answer key

  1. 49
  2. 610
  3. 607
  4. 185
  5. 754
  6. 208
  7. 204
  8. 221
  9. 944
  10. 662
  11. 471
  12. 38
  13. 131
  14. 642
  15. 582
  16. 40
  17. 93
  18. 439
  19. 60
  20. 887
  21. 408
  22. 60
  23. 842
  24. 293
  25. 916
  26. 622
  27. 795
  28. 948
  29. 968
  30. 272
  31. 816
  32. 123
  33. 156
  34. 626
  35. 365
  36. 290
  37. 170
  38. 163
  39. 66
  40. 835

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