← 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 435 · 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 school has 219 children. 199 of them are girls. How many boys are there?
  2. 2.A school has 502 children. 177 of them are girls. How many boys are there?
  3. 3.687 − 425 =
  4. 4.737 + ? = 947
  5. 5.661 + ? = 823
  6. 6.630 − ? = 244
  7. 7.971 − ? = 147
  8. 8.? − 267 = 13
  9. 9.266 − 101 =
  10. 10.? + 483 = 939
  11. 11.A train has 262 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  12. 12.648 + ? = 951
  13. 13.? + 361 = 863
  14. 14.504 + 331 =
  15. 15.626 + ? = 928
  16. 16.296 − 272 =
  17. 17.338 + 330 =
  18. 18.A school has 442 children. 278 of them are girls. How many boys are there?
  19. 19.593 − 126 =
  20. 20.A train has 253 people in the front coaches and 417 people in the back coaches. How many people are on the train?
  21. 21.203 + 264 =
  22. 22.A school has 818 children. 377 of them are girls. How many boys are there?
  23. 23.? + 791 = 924
  24. 24.A school has 228 children. 106 of them are girls. How many boys are there?
  25. 25.A train has 476 people in the front coaches and 384 people in the back coaches. How many people are on the train?
  26. 26.A train has 188 people in the front coaches and 356 people in the back coaches. How many people are on the train?
  27. 27.702 + 106 =
  28. 28.554 − ? = 293
  29. 29.552 − 179 =
  30. 30.? + 720 = 882
  31. 31.776 + 158 =
  32. 32.839 + 108 =
  33. 33.813 + 156 =
  34. 34.? + 550 = 670
  35. 35.A school has 691 children. 362 of them are girls. How many boys are there?
  36. 36.A train has 855 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  37. 37.644 + 115 =
  38. 38.A train has 330 people in the front coaches and 515 people in the back coaches. How many people are on the train?
  39. 39.366 + ? = 970
  40. 40.599 − ? = 258

Answer key

  1. 20
  2. 325
  3. 262
  4. 210
  5. 162
  6. 386
  7. 824
  8. 280
  9. 165
  10. 456
  11. 379
  12. 303
  13. 502
  14. 835
  15. 302
  16. 24
  17. 668
  18. 164
  19. 467
  20. 670
  21. 467
  22. 441
  23. 133
  24. 122
  25. 860
  26. 544
  27. 808
  28. 261
  29. 373
  30. 162
  31. 934
  32. 947
  33. 969
  34. 120
  35. 329
  36. 958
  37. 759
  38. 845
  39. 604
  40. 341

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