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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 70 · 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. 1.280 + ? = 540
  2. 2.214 + 544 =
  3. 3.701 + 201 =
  4. 4.686 − 106 =
  5. 5.? + 659 = 859
  6. 6.158 + 694 =
  7. 7.? + 287 = 659
  8. 8.553 − ? = 317
  9. 9.A train has 616 people in the front coaches and 140 people in the back coaches. How many people are on the train?
  10. 10.A train has 882 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  11. 11.A school has 503 children. 366 of them are girls. How many boys are there?
  12. 12.424 − ? = 137
  13. 13.A train has 414 people in the front coaches and 322 people in the back coaches. How many people are on the train?
  14. 14.? + 416 = 957
  15. 15.A train has 203 people in the front coaches and 513 people in the back coaches. How many people are on the train?
  16. 16.A train has 606 people in the front coaches and 342 people in the back coaches. How many people are on the train?
  17. 17.849 − ? = 272
  18. 18.A train has 453 people in the front coaches and 543 people in the back coaches. How many people are on the train?
  19. 19.A train has 784 people in the front coaches and 185 people in the back coaches. How many people are on the train?
  20. 20.944 − ? = 46
  21. 21.A train has 290 people in the front coaches and 678 people in the back coaches. How many people are on the train?
  22. 22.892 − ? = 36
  23. 23.491 − 104 =
  24. 24.? − 607 = 156
  25. 25.A train has 317 people in the front coaches and 178 people in the back coaches. How many people are on the train?
  26. 26.789 − 395 =
  27. 27.? − 192 = 205
  28. 28.836 + 109 =
  29. 29.A school has 628 children. 352 of them are girls. How many boys are there?
  30. 30.404 + 160 =
  31. 31.? + 740 = 901
  32. 32.755 − ? = 227
  33. 33.? − 106 = 689
  34. 34.485 + 493 =
  35. 35.? + 347 = 518
  36. 36.232 + 219 =
  37. 37.A train has 404 people in the front coaches and 475 people in the back coaches. How many people are on the train?
  38. 38.412 − 407 =
  39. 39.A school has 491 children. 454 of them are girls. How many boys are there?
  40. 40.781 + ? = 967

Answer key

  1. 260
  2. 758
  3. 902
  4. 580
  5. 200
  6. 852
  7. 372
  8. 236
  9. 756
  10. 997
  11. 137
  12. 287
  13. 736
  14. 541
  15. 716
  16. 948
  17. 577
  18. 996
  19. 969
  20. 898
  21. 968
  22. 856
  23. 387
  24. 763
  25. 495
  26. 394
  27. 397
  28. 945
  29. 276
  30. 564
  31. 161
  32. 528
  33. 795
  34. 978
  35. 171
  36. 451
  37. 879
  38. 5
  39. 37
  40. 186

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