← 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 505 · 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. 1.877 − 452 =
  2. 2.? + 189 = 560
  3. 3.A train has 195 people in the front coaches and 776 people in the back coaches. How many people are on the train?
  4. 4.761 + 178 =
  5. 5.A school has 750 children. 305 of them are girls. How many boys are there?
  6. 6.A school has 895 children. 889 of them are girls. How many boys are there?
  7. 7.A train has 258 people in the front coaches and 219 people in the back coaches. How many people are on the train?
  8. 8.? + 141 = 987
  9. 9.A school has 297 children. 102 of them are girls. How many boys are there?
  10. 10.A train has 201 people in the front coaches and 404 people in the back coaches. How many people are on the train?
  11. 11.607 − 221 =
  12. 12.? + 418 = 898
  13. 13.627 − ? = 524
  14. 14.841 + 131 =
  15. 15.567 + ? = 726
  16. 16.A train has 262 people in the front coaches and 547 people in the back coaches. How many people are on the train?
  17. 17.A school has 501 children. 116 of them are girls. How many boys are there?
  18. 18.254 − 238 =
  19. 19.704 + 125 =
  20. 20.874 + 101 =
  21. 21.A school has 650 children. 543 of them are girls. How many boys are there?
  22. 22.? + 689 = 879
  23. 23.? + 500 = 972
  24. 24.A train has 287 people in the front coaches and 386 people in the back coaches. How many people are on the train?
  25. 25.619 − ? = 486
  26. 26.651 − 553 =
  27. 27.? − 205 = 280
  28. 28.782 − ? = 212
  29. 29.? − 131 = 620
  30. 30.307 + 591 =
  31. 31.825 + 129 =
  32. 32.A school has 339 children. 188 of them are girls. How many boys are there?
  33. 33.741 + 128 =
  34. 34.897 − ? = 125
  35. 35.A train has 894 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  36. 36.? + 239 = 606
  37. 37.403 − 318 =
  38. 38.804 + 141 =
  39. 39.763 − 409 =
  40. 40.A school has 363 children. 200 of them are girls. How many boys are there?

Answer key

  1. 425
  2. 371
  3. 971
  4. 939
  5. 445
  6. 6
  7. 477
  8. 846
  9. 195
  10. 605
  11. 386
  12. 480
  13. 103
  14. 972
  15. 159
  16. 809
  17. 385
  18. 16
  19. 829
  20. 975
  21. 107
  22. 190
  23. 472
  24. 673
  25. 133
  26. 98
  27. 485
  28. 570
  29. 751
  30. 898
  31. 954
  32. 151
  33. 869
  34. 772
  35. 995
  36. 367
  37. 85
  38. 945
  39. 354
  40. 163

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