← 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 236 · 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 332 people in the front coaches and 479 people in the back coaches. How many people are on the train?
  2. 2.986 − 398 =
  3. 3.271 + 255 =
  4. 4.? − 182 = 145
  5. 5.? − 701 = 285
  6. 6.A school has 631 children. 174 of them are girls. How many boys are there?
  7. 7.554 + 249 =
  8. 8.A school has 306 children. 292 of them are girls. How many boys are there?
  9. 9.555 − 438 =
  10. 10.528 + 146 =
  11. 11.270 + ? = 456
  12. 12.854 + 112 =
  13. 13.A train has 364 people in the front coaches and 341 people in the back coaches. How many people are on the train?
  14. 14.A train has 438 people in the front coaches and 556 people in the back coaches. How many people are on the train?
  15. 15.? − 171 = 71
  16. 16.? + 219 = 320
  17. 17.A train has 595 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  18. 18.A school has 465 children. 323 of them are girls. How many boys are there?
  19. 19.A train has 329 people in the front coaches and 177 people in the back coaches. How many people are on the train?
  20. 20.? − 215 = 126
  21. 21.344 + 155 =
  22. 22.? + 161 = 645
  23. 23.203 + 795 =
  24. 24.605 + 374 =
  25. 25.? − 130 = 654
  26. 26.232 − 154 =
  27. 27.635 + 161 =
  28. 28.A school has 886 children. 259 of them are girls. How many boys are there?
  29. 29.605 − 527 =
  30. 30.A train has 124 people in the front coaches and 381 people in the back coaches. How many people are on the train?
  31. 31.397 + 550 =
  32. 32.928 − 433 =
  33. 33.A school has 298 children. 244 of them are girls. How many boys are there?
  34. 34.785 + 161 =
  35. 35.186 + 289 =
  36. 36.913 − 229 =
  37. 37.436 − ? = 76
  38. 38.A school has 439 children. 381 of them are girls. How many boys are there?
  39. 39.? + 513 = 676
  40. 40.634 + 334 =

Answer key

  1. 811
  2. 588
  3. 526
  4. 327
  5. 986
  6. 457
  7. 803
  8. 14
  9. 117
  10. 674
  11. 186
  12. 966
  13. 705
  14. 994
  15. 242
  16. 101
  17. 705
  18. 142
  19. 506
  20. 341
  21. 499
  22. 484
  23. 998
  24. 979
  25. 784
  26. 78
  27. 796
  28. 627
  29. 78
  30. 505
  31. 947
  32. 495
  33. 54
  34. 946
  35. 475
  36. 684
  37. 360
  38. 58
  39. 163
  40. 968

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