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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 263 · 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 302 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  2. 2.? + 448 = 606
  3. 3.487 + ? = 748
  4. 4.A train has 365 people in the front coaches and 188 people in the back coaches. How many people are on the train?
  5. 5.A school has 966 children. 929 of them are girls. How many boys are there?
  6. 6.589 − 204 =
  7. 7.? − 377 = 46
  8. 8.A school has 897 children. 102 of them are girls. How many boys are there?
  9. 9.290 + 604 =
  10. 10.439 − ? = 145
  11. 11.250 + 741 =
  12. 12.811 + 103 =
  13. 13.A train has 676 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  14. 14.497 − 344 =
  15. 15.899 − 802 =
  16. 16.697 − 454 =
  17. 17.? + 285 = 942
  18. 18.A school has 277 children. 106 of them are girls. How many boys are there?
  19. 19.283 − 124 =
  20. 20.339 − 146 =
  21. 21.657 + 106 =
  22. 22.369 − 177 =
  23. 23.A train has 783 people in the front coaches and 170 people in the back coaches. How many people are on the train?
  24. 24.? − 318 = 245
  25. 25.402 + 416 =
  26. 26.A school has 680 children. 132 of them are girls. How many boys are there?
  27. 27.? + 190 = 736
  28. 28.? − 424 = 331
  29. 29.777 − 643 =
  30. 30.823 + ? = 931
  31. 31.A school has 624 children. 574 of them are girls. How many boys are there?
  32. 32.683 + 113 =
  33. 33.A train has 546 people in the front coaches and 141 people in the back coaches. How many people are on the train?
  34. 34.? + 345 = 768
  35. 35.A train has 205 people in the front coaches and 660 people in the back coaches. How many people are on the train?
  36. 36.A train has 502 people in the front coaches and 478 people in the back coaches. How many people are on the train?
  37. 37.A school has 228 children. 130 of them are girls. How many boys are there?
  38. 38.751 − 604 =
  39. 39.493 + 119 =
  40. 40.525 + 177 =

Answer key

  1. 432
  2. 158
  3. 261
  4. 553
  5. 37
  6. 385
  7. 423
  8. 795
  9. 894
  10. 294
  11. 991
  12. 914
  13. 776
  14. 153
  15. 97
  16. 243
  17. 657
  18. 171
  19. 159
  20. 193
  21. 763
  22. 192
  23. 953
  24. 563
  25. 818
  26. 548
  27. 546
  28. 755
  29. 134
  30. 108
  31. 50
  32. 796
  33. 687
  34. 423
  35. 865
  36. 980
  37. 98
  38. 147
  39. 612
  40. 702

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