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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 138 · 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. 1.911 − ? = 580
  2. 2.A train has 230 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  3. 3.253 − ? = 100
  4. 4.A school has 450 children. 301 of them are girls. How many boys are there?
  5. 5.503 + 445 =
  6. 6.146 + ? = 756
  7. 7.A school has 208 children. 171 of them are girls. How many boys are there?
  8. 8.A train has 286 people in the front coaches and 308 people in the back coaches. How many people are on the train?
  9. 9.A train has 733 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  10. 10.790 + 150 =
  11. 11.586 + 316 =
  12. 12.315 + ? = 465
  13. 13.? + 292 = 784
  14. 14.A train has 670 people in the front coaches and 253 people in the back coaches. How many people are on the train?
  15. 15.863 + 114 =
  16. 16.387 − ? = 69
  17. 17.839 − 266 =
  18. 18.593 + 187 =
  19. 19.? − 228 = 163
  20. 20.767 + ? = 991
  21. 21.A school has 646 children. 276 of them are girls. How many boys are there?
  22. 22.? − 171 = 211
  23. 23.280 − 136 =
  24. 24.? − 192 = 452
  25. 25.A train has 360 people in the front coaches and 383 people in the back coaches. How many people are on the train?
  26. 26.712 + ? = 971
  27. 27.716 + ? = 918
  28. 28.714 − 606 =
  29. 29.A train has 781 people in the front coaches and 212 people in the back coaches. How many people are on the train?
  30. 30.750 − ? = 461
  31. 31.? + 305 = 941
  32. 32.A school has 347 children. 219 of them are girls. How many boys are there?
  33. 33.? − 468 = 41
  34. 34.520 − 298 =
  35. 35.162 + 243 =
  36. 36.200 − ? = 63
  37. 37.? − 312 = 55
  38. 38.282 + ? = 514
  39. 39.A school has 419 children. 244 of them are girls. How many boys are there?
  40. 40.690 + 112 =

Answer key

  1. 331
  2. 385
  3. 153
  4. 149
  5. 948
  6. 610
  7. 37
  8. 594
  9. 860
  10. 940
  11. 902
  12. 150
  13. 492
  14. 923
  15. 977
  16. 318
  17. 573
  18. 780
  19. 391
  20. 224
  21. 370
  22. 382
  23. 144
  24. 644
  25. 743
  26. 259
  27. 202
  28. 108
  29. 993
  30. 289
  31. 636
  32. 128
  33. 509
  34. 222
  35. 405
  36. 137
  37. 367
  38. 232
  39. 175
  40. 802

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