← 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 483 · 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. 1.858 + 111 =
  2. 2.? + 268 = 586
  3. 3.? − 242 = 102
  4. 4.735 + 209 =
  5. 5.? + 550 = 860
  6. 6.508 − 356 =
  7. 7.A school has 215 children. 167 of them are girls. How many boys are there?
  8. 8.? − 666 = 187
  9. 9.? + 253 = 764
  10. 10.A school has 945 children. 754 of them are girls. How many boys are there?
  11. 11.645 − ? = 262
  12. 12.A train has 842 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  13. 13.A school has 493 children. 442 of them are girls. How many boys are there?
  14. 14.A school has 750 children. 433 of them are girls. How many boys are there?
  15. 15.556 + 308 =
  16. 16.153 + 514 =
  17. 17.428 + ? = 916
  18. 18.? + 365 = 818
  19. 19.A train has 876 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  20. 20.473 − ? = 235
  21. 21.664 + 221 =
  22. 22.739 + 135 =
  23. 23.621 − 279 =
  24. 24.920 − ? = 9
  25. 25.387 − 208 =
  26. 26.599 − 209 =
  27. 27.? − 182 = 99
  28. 28.A train has 788 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  29. 29.280 + ? = 999
  30. 30.A train has 279 people in the front coaches and 715 people in the back coaches. How many people are on the train?
  31. 31.? + 759 = 934
  32. 32.A train has 589 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  33. 33.A school has 778 children. 671 of them are girls. How many boys are there?
  34. 34.? − 430 = 83
  35. 35.605 − 382 =
  36. 36.645 + ? = 790
  37. 37.? − 318 = 223
  38. 38.A train has 835 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  39. 39.234 + 668 =
  40. 40.A train has 132 people in the front coaches and 122 people in the back coaches. How many people are on the train?

Answer key

  1. 969
  2. 318
  3. 344
  4. 944
  5. 310
  6. 152
  7. 48
  8. 853
  9. 511
  10. 191
  11. 383
  12. 998
  13. 51
  14. 317
  15. 864
  16. 667
  17. 488
  18. 453
  19. 987
  20. 238
  21. 885
  22. 874
  23. 342
  24. 911
  25. 179
  26. 390
  27. 281
  28. 970
  29. 719
  30. 994
  31. 175
  32. 707
  33. 107
  34. 513
  35. 223
  36. 145
  37. 541
  38. 962
  39. 902
  40. 254

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