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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 334 · 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. 1.474 + 231 =
  2. 2.? − 190 = 738
  3. 3.A school has 766 children. 685 of them are girls. How many boys are there?
  4. 4.A train has 736 people in the front coaches and 258 people in the back coaches. How many people are on the train?
  5. 5.236 + 729 =
  6. 6.460 + 335 =
  7. 7.734 + ? = 987
  8. 8.? − 599 = 203
  9. 9.860 − 695 =
  10. 10.697 + 105 =
  11. 11.738 + 194 =
  12. 12.A train has 194 people in the front coaches and 244 people in the back coaches. How many people are on the train?
  13. 13.666 − 371 =
  14. 14.? − 658 = 118
  15. 15.385 − ? = 25
  16. 16.A school has 413 children. 189 of them are girls. How many boys are there?
  17. 17.A train has 229 people in the front coaches and 439 people in the back coaches. How many people are on the train?
  18. 18.411 − ? = 277
  19. 19.A school has 826 children. 357 of them are girls. How many boys are there?
  20. 20.A school has 338 children. 242 of them are girls. How many boys are there?
  21. 21.A train has 631 people in the front coaches and 329 people in the back coaches. How many people are on the train?
  22. 22.798 + ? = 997
  23. 23.109 + 169 =
  24. 24.? − 728 = 92
  25. 25.364 + 315 =
  26. 26.187 + 339 =
  27. 27.891 + 102 =
  28. 28.268 + 329 =
  29. 29.? − 203 = 237
  30. 30.381 + 505 =
  31. 31.652 − 330 =
  32. 32.379 − ? = 258
  33. 33.559 + 195 =
  34. 34.? + 104 = 286
  35. 35.672 − 285 =
  36. 36.A train has 896 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  37. 37.A school has 654 children. 187 of them are girls. How many boys are there?
  38. 38.851 + ? = 987
  39. 39.? − 221 = 237
  40. 40.731 + 205 =

Answer key

  1. 705
  2. 928
  3. 81
  4. 994
  5. 965
  6. 795
  7. 253
  8. 802
  9. 165
  10. 802
  11. 932
  12. 438
  13. 295
  14. 776
  15. 360
  16. 224
  17. 668
  18. 134
  19. 469
  20. 96
  21. 960
  22. 199
  23. 278
  24. 820
  25. 679
  26. 526
  27. 993
  28. 597
  29. 440
  30. 886
  31. 322
  32. 121
  33. 754
  34. 182
  35. 387
  36. 999
  37. 467
  38. 136
  39. 458
  40. 936

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