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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 460 · 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.A train has 202 people in the front coaches and 524 people in the back coaches. How many people are on the train?
  2. 2.276 + 283 =
  3. 3.? + 774 = 883
  4. 4.610 + 371 =
  5. 5.827 + 114 =
  6. 6.854 − ? = 188
  7. 7.A train has 474 people in the front coaches and 469 people in the back coaches. How many people are on the train?
  8. 8.? + 367 = 653
  9. 9.512 − ? = 267
  10. 10.A train has 843 people in the front coaches and 142 people in the back coaches. How many people are on the train?
  11. 11.A train has 298 people in the front coaches and 463 people in the back coaches. How many people are on the train?
  12. 12.A school has 219 children. 174 of them are girls. How many boys are there?
  13. 13.439 + ? = 604
  14. 14.730 + 176 =
  15. 15.A school has 647 children. 517 of them are girls. How many boys are there?
  16. 16.294 − 188 =
  17. 17.A school has 246 children. 152 of them are girls. How many boys are there?
  18. 18.959 − 399 =
  19. 19.A train has 721 people in the front coaches and 228 people in the back coaches. How many people are on the train?
  20. 20.621 + 249 =
  21. 21.800 + 136 =
  22. 22.958 − 553 =
  23. 23.588 − 586 =
  24. 24.? − 185 = 284
  25. 25.373 + 397 =
  26. 26.A train has 438 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  27. 27.A train has 809 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  28. 28.A train has 587 people in the front coaches and 333 people in the back coaches. How many people are on the train?
  29. 29.564 + ? = 974
  30. 30.756 + 190 =
  31. 31.? + 375 = 735
  32. 32.559 − 374 =
  33. 33.? − 106 = 203
  34. 34.127 + 684 =
  35. 35.? + 206 = 527
  36. 36.? − 104 = 219
  37. 37.342 + 508 =
  38. 38.585 + 317 =
  39. 39.? − 629 = 160
  40. 40.484 + 225 =

Answer key

  1. 726
  2. 559
  3. 109
  4. 981
  5. 941
  6. 666
  7. 943
  8. 286
  9. 245
  10. 985
  11. 761
  12. 45
  13. 165
  14. 906
  15. 130
  16. 106
  17. 94
  18. 560
  19. 949
  20. 870
  21. 936
  22. 405
  23. 2
  24. 469
  25. 770
  26. 568
  27. 910
  28. 920
  29. 410
  30. 946
  31. 360
  32. 185
  33. 309
  34. 811
  35. 321
  36. 323
  37. 850
  38. 902
  39. 789
  40. 709

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