← 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 973 · 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.? + 771 = 988
  2. 2.472 + 410 =
  3. 3.998 − ? = 373
  4. 4.355 − 268 =
  5. 5.A train has 135 people in the front coaches and 778 people in the back coaches. How many people are on the train?
  6. 6.172 + 453 =
  7. 7.A train has 768 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  8. 8.A school has 862 children. 712 of them are girls. How many boys are there?
  9. 9.728 + 237 =
  10. 10.A train has 606 people in the front coaches and 327 people in the back coaches. How many people are on the train?
  11. 11.A train has 615 people in the front coaches and 222 people in the back coaches. How many people are on the train?
  12. 12.671 + 169 =
  13. 13.850 + 104 =
  14. 14.104 + 331 =
  15. 15.115 + 320 =
  16. 16.? + 460 = 891
  17. 17.103 + 121 =
  18. 18.A school has 690 children. 118 of them are girls. How many boys are there?
  19. 19.? − 573 = 40
  20. 20.687 − 224 =
  21. 21.? + 488 = 614
  22. 22.628 + 176 =
  23. 23.724 + ? = 859
  24. 24.? + 473 = 946
  25. 25.648 + ? = 980
  26. 26.A school has 205 children. 105 of them are girls. How many boys are there?
  27. 27.396 − 116 =
  28. 28.A school has 351 children. 275 of them are girls. How many boys are there?
  29. 29.? − 516 = 198
  30. 30.822 + ? = 999
  31. 31.A school has 298 children. 101 of them are girls. How many boys are there?
  32. 32.A school has 319 children. 135 of them are girls. How many boys are there?
  33. 33.? + 876 = 984
  34. 34.341 + 214 =
  35. 35.? + 561 = 863
  36. 36.501 − 154 =
  37. 37.355 − 304 =
  38. 38.A train has 637 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  39. 39.666 − 425 =
  40. 40.919 − ? = 648

Answer key

  1. 217
  2. 882
  3. 625
  4. 87
  5. 913
  6. 625
  7. 950
  8. 150
  9. 965
  10. 933
  11. 837
  12. 840
  13. 954
  14. 435
  15. 435
  16. 431
  17. 224
  18. 572
  19. 613
  20. 463
  21. 126
  22. 804
  23. 135
  24. 473
  25. 332
  26. 100
  27. 280
  28. 76
  29. 714
  30. 177
  31. 197
  32. 184
  33. 108
  34. 555
  35. 302
  36. 347
  37. 51
  38. 753
  39. 241
  40. 271

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