← 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 622 · 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. 1.157 + 117 =
  2. 2.544 + 347 =
  3. 3.408 − 321 =
  4. 4.971 − ? = 540
  5. 5.728 − ? = 531
  6. 6.? − 237 = 167
  7. 7.723 + 166 =
  8. 8.A train has 175 people in the front coaches and 316 people in the back coaches. How many people are on the train?
  9. 9.528 − 350 =
  10. 10.A school has 409 children. 401 of them are girls. How many boys are there?
  11. 11.977 − ? = 191
  12. 12.A train has 151 people in the front coaches and 504 people in the back coaches. How many people are on the train?
  13. 13.A school has 770 children. 613 of them are girls. How many boys are there?
  14. 14.A train has 716 people in the front coaches and 170 people in the back coaches. How many people are on the train?
  15. 15.218 + ? = 833
  16. 16.A train has 768 people in the front coaches and 150 people in the back coaches. How many people are on the train?
  17. 17.348 + 506 =
  18. 18.A train has 604 people in the front coaches and 131 people in the back coaches. How many people are on the train?
  19. 19.? − 610 = 170
  20. 20.774 + ? = 884
  21. 21.960 − 306 =
  22. 22.463 + 172 =
  23. 23.119 + 207 =
  24. 24.346 − 314 =
  25. 25.? + 239 = 692
  26. 26.737 − 194 =
  27. 27.383 + ? = 580
  28. 28.? + 199 = 318
  29. 29.A train has 413 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  30. 30.? − 236 = 98
  31. 31.A school has 503 children. 332 of them are girls. How many boys are there?
  32. 32.? − 207 = 23
  33. 33.280 + 594 =
  34. 34.735 − 550 =
  35. 35.982 − 119 =
  36. 36.183 + ? = 456
  37. 37.802 − 521 =
  38. 38.471 + ? = 908
  39. 39.A school has 785 children. 572 of them are girls. How many boys are there?
  40. 40.? − 313 = 462

Answer key

  1. 274
  2. 891
  3. 87
  4. 431
  5. 197
  6. 404
  7. 889
  8. 491
  9. 178
  10. 8
  11. 786
  12. 655
  13. 157
  14. 886
  15. 615
  16. 918
  17. 854
  18. 735
  19. 780
  20. 110
  21. 654
  22. 635
  23. 326
  24. 32
  25. 453
  26. 543
  27. 197
  28. 119
  29. 626
  30. 334
  31. 171
  32. 230
  33. 874
  34. 185
  35. 863
  36. 273
  37. 281
  38. 437
  39. 213
  40. 775

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