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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 569 · 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. 1.242 − 189 =
  2. 2.772 + 222 =
  3. 3.? + 325 = 911
  4. 4.? + 434 = 932
  5. 5.A school has 497 children. 485 of them are girls. How many boys are there?
  6. 6.552 + ? = 712
  7. 7.549 − 490 =
  8. 8.A train has 781 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  9. 9.A train has 619 people in the front coaches and 280 people in the back coaches. How many people are on the train?
  10. 10.A school has 598 children. 555 of them are girls. How many boys are there?
  11. 11.A train has 670 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  12. 12.? − 239 = 170
  13. 13.795 + 190 =
  14. 14.768 − 299 =
  15. 15.482 + ? = 705
  16. 16.709 + 107 =
  17. 17.402 − 387 =
  18. 18.623 − 553 =
  19. 19.365 + ? = 611
  20. 20.? − 174 = 80
  21. 21.A train has 858 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  22. 22.292 − 235 =
  23. 23.A school has 532 children. 209 of them are girls. How many boys are there?
  24. 24.A school has 896 children. 825 of them are girls. How many boys are there?
  25. 25.A school has 755 children. 222 of them are girls. How many boys are there?
  26. 26.695 + ? = 963
  27. 27.A school has 567 children. 541 of them are girls. How many boys are there?
  28. 28.702 + 124 =
  29. 29.A school has 825 children. 784 of them are girls. How many boys are there?
  30. 30.625 + 109 =
  31. 31.485 − 298 =
  32. 32.311 + 655 =
  33. 33.A train has 536 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  34. 34.459 − 178 =
  35. 35.A train has 822 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  36. 36.435 − ? = 136
  37. 37.? + 183 = 450
  38. 38.? − 476 = 335
  39. 39.108 + ? = 674
  40. 40.A train has 886 people in the front coaches and 102 people in the back coaches. How many people are on the train?

Answer key

  1. 53
  2. 994
  3. 586
  4. 498
  5. 12
  6. 160
  7. 59
  8. 955
  9. 899
  10. 43
  11. 788
  12. 409
  13. 985
  14. 469
  15. 223
  16. 816
  17. 15
  18. 70
  19. 246
  20. 254
  21. 997
  22. 57
  23. 323
  24. 71
  25. 533
  26. 268
  27. 26
  28. 826
  29. 41
  30. 734
  31. 187
  32. 966
  33. 666
  34. 281
  35. 927
  36. 299
  37. 267
  38. 811
  39. 566
  40. 988

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