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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 465 · 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.A train has 272 people in the front coaches and 142 people in the back coaches. How many people are on the train?
  2. 2.A school has 212 children. 209 of them are girls. How many boys are there?
  3. 3.233 + ? = 759
  4. 4.? + 378 = 751
  5. 5.A train has 307 people in the front coaches and 371 people in the back coaches. How many people are on the train?
  6. 6.A train has 743 people in the front coaches and 192 people in the back coaches. How many people are on the train?
  7. 7.222 + 621 =
  8. 8.A school has 677 children. 291 of them are girls. How many boys are there?
  9. 9.638 − ? = 403
  10. 10.451 + 152 =
  11. 11.A school has 211 children. 135 of them are girls. How many boys are there?
  12. 12.A train has 289 people in the front coaches and 485 people in the back coaches. How many people are on the train?
  13. 13.149 + 276 =
  14. 14.A train has 395 people in the front coaches and 178 people in the back coaches. How many people are on the train?
  15. 15.A school has 295 children. 213 of them are girls. How many boys are there?
  16. 16.352 − 108 =
  17. 17.A school has 273 children. 118 of them are girls. How many boys are there?
  18. 18.880 − 502 =
  19. 19.735 − 121 =
  20. 20.A train has 237 people in the front coaches and 157 people in the back coaches. How many people are on the train?
  21. 21.A train has 522 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  22. 22.456 − 142 =
  23. 23.501 + 223 =
  24. 24.A train has 610 people in the front coaches and 279 people in the back coaches. How many people are on the train?
  25. 25.380 + 374 =
  26. 26.699 − 615 =
  27. 27.A train has 778 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  28. 28.823 + 146 =
  29. 29.A train has 374 people in the front coaches and 390 people in the back coaches. How many people are on the train?
  30. 30.A school has 336 children. 100 of them are girls. How many boys are there?
  31. 31.A train has 132 people in the front coaches and 775 people in the back coaches. How many people are on the train?
  32. 32.710 + 192 =
  33. 33.230 + 357 =
  34. 34.720 − 263 =
  35. 35.A school has 796 children. 537 of them are girls. How many boys are there?
  36. 36.335 + 399 =
  37. 37.A train has 467 people in the front coaches and 452 people in the back coaches. How many people are on the train?
  38. 38.? + 129 = 534
  39. 39.A school has 912 children. 688 of them are girls. How many boys are there?
  40. 40.A train has 701 people in the front coaches and 133 people in the back coaches. How many people are on the train?

Answer key

  1. 414
  2. 3
  3. 526
  4. 373
  5. 678
  6. 935
  7. 843
  8. 386
  9. 235
  10. 603
  11. 76
  12. 774
  13. 425
  14. 573
  15. 82
  16. 244
  17. 155
  18. 378
  19. 614
  20. 394
  21. 666
  22. 314
  23. 724
  24. 889
  25. 754
  26. 84
  27. 889
  28. 969
  29. 764
  30. 236
  31. 907
  32. 902
  33. 587
  34. 457
  35. 259
  36. 734
  37. 919
  38. 405
  39. 224
  40. 834

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