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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 701 · 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. 1.141 + 704 =
  2. 2.683 − 433 =
  3. 3.A train has 576 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  4. 4.? − 637 = 257
  5. 5.856 − ? = 730
  6. 6.618 − ? = 388
  7. 7.? + 381 = 550
  8. 8.A school has 344 children. 226 of them are girls. How many boys are there?
  9. 9.196 + 319 =
  10. 10.A train has 216 people in the front coaches and 376 people in the back coaches. How many people are on the train?
  11. 11.A train has 851 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  12. 12.219 + 473 =
  13. 13.A train has 169 people in the front coaches and 722 people in the back coaches. How many people are on the train?
  14. 14.234 + 247 =
  15. 15.A train has 591 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  16. 16.217 + 528 =
  17. 17.511 − ? = 136
  18. 18.836 − 126 =
  19. 19.A school has 209 children. 178 of them are girls. How many boys are there?
  20. 20.A school has 883 children. 739 of them are girls. How many boys are there?
  21. 21.929 − ? = 778
  22. 22.678 + 300 =
  23. 23.158 + 180 =
  24. 24.A train has 350 people in the front coaches and 483 people in the back coaches. How many people are on the train?
  25. 25.515 − ? = 197
  26. 26.A train has 569 people in the front coaches and 261 people in the back coaches. How many people are on the train?
  27. 27.A train has 454 people in the front coaches and 396 people in the back coaches. How many people are on the train?
  28. 28.445 − ? = 8
  29. 29.A school has 654 children. 431 of them are girls. How many boys are there?
  30. 30.A school has 381 children. 300 of them are girls. How many boys are there?
  31. 31.A train has 479 people in the front coaches and 167 people in the back coaches. How many people are on the train?
  32. 32.? + 130 = 947
  33. 33.A train has 302 people in the front coaches and 661 people in the back coaches. How many people are on the train?
  34. 34.A school has 223 children. 108 of them are girls. How many boys are there?
  35. 35.A train has 113 people in the front coaches and 175 people in the back coaches. How many people are on the train?
  36. 36.A train has 517 people in the front coaches and 248 people in the back coaches. How many people are on the train?
  37. 37.A school has 287 children. 171 of them are girls. How many boys are there?
  38. 38.? + 666 = 806
  39. 39.? + 294 = 408
  40. 40.856 − 115 =

Answer key

  1. 845
  2. 250
  3. 734
  4. 894
  5. 126
  6. 230
  7. 169
  8. 118
  9. 515
  10. 592
  11. 958
  12. 692
  13. 891
  14. 481
  15. 746
  16. 745
  17. 375
  18. 710
  19. 31
  20. 144
  21. 151
  22. 978
  23. 338
  24. 833
  25. 318
  26. 830
  27. 850
  28. 437
  29. 223
  30. 81
  31. 646
  32. 817
  33. 963
  34. 115
  35. 288
  36. 765
  37. 116
  38. 140
  39. 114
  40. 741

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