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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 220 · 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. 1.121 + 259 =
  2. 2.A train has 194 people in the front coaches and 247 people in the back coaches. How many people are on the train?
  3. 3.294 − ? = 77
  4. 4.A school has 378 children. 223 of them are girls. How many boys are there?
  5. 5.898 + 100 =
  6. 6.667 + 143 =
  7. 7.? − 107 = 259
  8. 8.A train has 122 people in the front coaches and 435 people in the back coaches. How many people are on the train?
  9. 9.A school has 375 children. 200 of them are girls. How many boys are there?
  10. 10.133 + 183 =
  11. 11.549 − 108 =
  12. 12.A school has 780 children. 217 of them are girls. How many boys are there?
  13. 13.594 + ? = 891
  14. 14.? − 861 = 69
  15. 15.A school has 214 children. 129 of them are girls. How many boys are there?
  16. 16.? + 759 = 892
  17. 17.278 + 329 =
  18. 18.443 + 238 =
  19. 19.A train has 602 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  20. 20.A school has 269 children. 114 of them are girls. How many boys are there?
  21. 21.992 − 365 =
  22. 22.A train has 308 people in the front coaches and 635 people in the back coaches. How many people are on the train?
  23. 23.A school has 513 children. 361 of them are girls. How many boys are there?
  24. 24.A school has 421 children. 309 of them are girls. How many boys are there?
  25. 25.A school has 762 children. 435 of them are girls. How many boys are there?
  26. 26.714 + 229 =
  27. 27.A train has 246 people in the front coaches and 720 people in the back coaches. How many people are on the train?
  28. 28.397 − ? = 210
  29. 29.239 + 113 =
  30. 30.A train has 895 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  31. 31.? + 717 = 953
  32. 32.A train has 134 people in the front coaches and 250 people in the back coaches. How many people are on the train?
  33. 33.A train has 339 people in the front coaches and 588 people in the back coaches. How many people are on the train?
  34. 34.895 + 103 =
  35. 35.A train has 211 people in the front coaches and 468 people in the back coaches. How many people are on the train?
  36. 36.526 + 421 =
  37. 37.A train has 609 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  38. 38.A train has 468 people in the front coaches and 495 people in the back coaches. How many people are on the train?
  39. 39.322 − 233 =
  40. 40.? + 362 = 764

Answer key

  1. 380
  2. 441
  3. 217
  4. 155
  5. 998
  6. 810
  7. 366
  8. 557
  9. 175
  10. 316
  11. 441
  12. 563
  13. 297
  14. 930
  15. 85
  16. 133
  17. 607
  18. 681
  19. 879
  20. 155
  21. 627
  22. 943
  23. 152
  24. 112
  25. 327
  26. 943
  27. 966
  28. 187
  29. 352
  30. 999
  31. 236
  32. 384
  33. 927
  34. 998
  35. 679
  36. 947
  37. 723
  38. 963
  39. 89
  40. 402

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