← 3-digit addition and subtraction lesson New set →

Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 949 · 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.? + 473 = 850
  2. 2.293 + 252 =
  3. 3.A train has 124 people in the front coaches and 626 people in the back coaches. How many people are on the train?
  4. 4.804 − ? = 69
  5. 5.A school has 717 children. 122 of them are girls. How many boys are there?
  6. 6.535 + 434 =
  7. 7.704 − 316 =
  8. 8.692 + 265 =
  9. 9.881 − ? = 345
  10. 10.740 − 640 =
  11. 11.? + 231 = 676
  12. 12.A school has 929 children. 487 of them are girls. How many boys are there?
  13. 13.A school has 395 children. 357 of them are girls. How many boys are there?
  14. 14.681 − 416 =
  15. 15.A train has 229 people in the front coaches and 165 people in the back coaches. How many people are on the train?
  16. 16.244 + 146 =
  17. 17.485 − 261 =
  18. 18.? + 783 = 886
  19. 19.587 + ? = 817
  20. 20.901 − 799 =
  21. 21.A train has 836 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  22. 22.A school has 451 children. 327 of them are girls. How many boys are there?
  23. 23.367 + 484 =
  24. 24.489 − 423 =
  25. 25.472 + ? = 794
  26. 26.778 + 128 =
  27. 27.? − 242 = 427
  28. 28.A train has 130 people in the front coaches and 449 people in the back coaches. How many people are on the train?
  29. 29.571 + ? = 964
  30. 30.A train has 575 people in the front coaches and 391 people in the back coaches. How many people are on the train?
  31. 31.A train has 845 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  32. 32.A school has 263 children. 180 of them are girls. How many boys are there?
  33. 33.366 − 165 =
  34. 34.A train has 668 people in the front coaches and 210 people in the back coaches. How many people are on the train?
  35. 35.341 − 263 =
  36. 36.A school has 939 children. 436 of them are girls. How many boys are there?
  37. 37.604 + 349 =
  38. 38.977 − ? = 866
  39. 39.A train has 350 people in the front coaches and 582 people in the back coaches. How many people are on the train?
  40. 40.? − 298 = 164

Answer key

  1. 377
  2. 545
  3. 750
  4. 735
  5. 595
  6. 969
  7. 388
  8. 957
  9. 536
  10. 100
  11. 445
  12. 442
  13. 38
  14. 265
  15. 394
  16. 390
  17. 224
  18. 103
  19. 230
  20. 102
  21. 948
  22. 124
  23. 851
  24. 66
  25. 322
  26. 906
  27. 669
  28. 579
  29. 393
  30. 966
  31. 996
  32. 83
  33. 201
  34. 878
  35. 78
  36. 503
  37. 953
  38. 111
  39. 932
  40. 462

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets