← 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 484 · 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. 1.723 + ? = 963
  2. 2.A school has 634 children. 435 of them are girls. How many boys are there?
  3. 3.972 − ? = 375
  4. 4.A train has 371 people in the front coaches and 588 people in the back coaches. How many people are on the train?
  5. 5.324 − 240 =
  6. 6.? + 887 = 991
  7. 7.A school has 446 children. 365 of them are girls. How many boys are there?
  8. 8.488 + 348 =
  9. 9.? + 124 = 509
  10. 10.870 + 107 =
  11. 11.785 + ? = 950
  12. 12.? − 843 = 35
  13. 13.A train has 749 people in the front coaches and 195 people in the back coaches. How many people are on the train?
  14. 14.A school has 306 children. 148 of them are girls. How many boys are there?
  15. 15.582 + 159 =
  16. 16.A school has 616 children. 364 of them are girls. How many boys are there?
  17. 17.? − 117 = 594
  18. 18.A train has 855 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  19. 19.698 − 249 =
  20. 20.A train has 474 people in the front coaches and 224 people in the back coaches. How many people are on the train?
  21. 21.158 + 228 =
  22. 22.242 − 184 =
  23. 23.639 − 543 =
  24. 24.A train has 714 people in the front coaches and 251 people in the back coaches. How many people are on the train?
  25. 25.992 − 304 =
  26. 26.209 + 188 =
  27. 27.265 − ? = 126
  28. 28.347 − 242 =
  29. 29.A school has 498 children. 108 of them are girls. How many boys are there?
  30. 30.798 − 718 =
  31. 31.346 + 165 =
  32. 32.? + 363 = 554
  33. 33.A school has 792 children. 515 of them are girls. How many boys are there?
  34. 34.? − 317 = 114
  35. 35.A school has 637 children. 124 of them are girls. How many boys are there?
  36. 36.783 + ? = 961
  37. 37.434 + ? = 668
  38. 38.248 + 345 =
  39. 39.541 − 509 =
  40. 40.A train has 284 people in the front coaches and 462 people in the back coaches. How many people are on the train?

Answer key

  1. 240
  2. 199
  3. 597
  4. 959
  5. 84
  6. 104
  7. 81
  8. 836
  9. 385
  10. 977
  11. 165
  12. 878
  13. 944
  14. 158
  15. 741
  16. 252
  17. 711
  18. 985
  19. 449
  20. 698
  21. 386
  22. 58
  23. 96
  24. 965
  25. 688
  26. 397
  27. 139
  28. 105
  29. 390
  30. 80
  31. 511
  32. 191
  33. 277
  34. 431
  35. 513
  36. 178
  37. 234
  38. 593
  39. 32
  40. 746

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