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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 872 · 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.? + 693 = 851
  2. 2.A train has 129 people in the front coaches and 239 people in the back coaches. How many people are on the train?
  3. 3.349 − 228 =
  4. 4.250 − 156 =
  5. 5.A school has 583 children. 118 of them are girls. How many boys are there?
  6. 6.476 − 284 =
  7. 7.651 − ? = 147
  8. 8.968 − 221 =
  9. 9.A school has 689 children. 395 of them are girls. How many boys are there?
  10. 10.780 − 603 =
  11. 11.? − 545 = 256
  12. 12.A school has 333 children. 146 of them are girls. How many boys are there?
  13. 13.? + 130 = 318
  14. 14.A train has 899 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  15. 15.116 + 234 =
  16. 16.A train has 544 people in the front coaches and 190 people in the back coaches. How many people are on the train?
  17. 17.A school has 632 children. 325 of them are girls. How many boys are there?
  18. 18.689 − ? = 246
  19. 19.888 − 396 =
  20. 20.302 + ? = 897
  21. 21.149 + 453 =
  22. 22.337 − 139 =
  23. 23.A train has 180 people in the front coaches and 329 people in the back coaches. How many people are on the train?
  24. 24.893 − 268 =
  25. 25.? + 396 = 890
  26. 26.332 − 291 =
  27. 27.A train has 655 people in the front coaches and 299 people in the back coaches. How many people are on the train?
  28. 28.A school has 519 children. 216 of them are girls. How many boys are there?
  29. 29.A train has 247 people in the front coaches and 610 people in the back coaches. How many people are on the train?
  30. 30.894 − 500 =
  31. 31.259 − ? = 133
  32. 32.271 + ? = 818
  33. 33.616 + 365 =
  34. 34.614 − 247 =
  35. 35.298 + ? = 567
  36. 36.A train has 101 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  37. 37.666 + 143 =
  38. 38.A school has 485 children. 333 of them are girls. How many boys are there?
  39. 39.A school has 675 children. 545 of them are girls. How many boys are there?
  40. 40.225 + 121 =

Answer key

  1. 158
  2. 368
  3. 121
  4. 94
  5. 465
  6. 192
  7. 504
  8. 747
  9. 294
  10. 177
  11. 801
  12. 187
  13. 188
  14. 999
  15. 350
  16. 734
  17. 307
  18. 443
  19. 492
  20. 595
  21. 602
  22. 198
  23. 509
  24. 625
  25. 494
  26. 41
  27. 954
  28. 303
  29. 857
  30. 394
  31. 126
  32. 547
  33. 981
  34. 367
  35. 269
  36. 256
  37. 809
  38. 152
  39. 130
  40. 346

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