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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 673 · 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.? − 376 = 44
  2. 2.955 − 577 =
  3. 3.308 − ? = 64
  4. 4.A train has 379 people in the front coaches and 251 people in the back coaches. How many people are on the train?
  5. 5.? − 143 = 338
  6. 6.573 − 318 =
  7. 7.A train has 111 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  8. 8.? − 218 = 465
  9. 9.789 − 367 =
  10. 10.A train has 280 people in the front coaches and 652 people in the back coaches. How many people are on the train?
  11. 11.951 − ? = 576
  12. 12.A train has 772 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  13. 13.171 + 404 =
  14. 14.A train has 459 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  15. 15.A train has 132 people in the front coaches and 746 people in the back coaches. How many people are on the train?
  16. 16.147 + ? = 589
  17. 17.213 − 139 =
  18. 18.537 + 423 =
  19. 19.A school has 978 children. 539 of them are girls. How many boys are there?
  20. 20.392 + 140 =
  21. 21.A school has 480 children. 288 of them are girls. How many boys are there?
  22. 22.243 + 653 =
  23. 23.A school has 627 children. 225 of them are girls. How many boys are there?
  24. 24.571 + 302 =
  25. 25.A train has 873 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  26. 26.A school has 451 children. 141 of them are girls. How many boys are there?
  27. 27.527 − 190 =
  28. 28.A school has 603 children. 122 of them are girls. How many boys are there?
  29. 29.818 + 138 =
  30. 30.368 − 153 =
  31. 31.? − 615 = 5
  32. 32.? + 252 = 596
  33. 33.645 + 137 =
  34. 34.493 − 125 =
  35. 35.750 + 178 =
  36. 36.A train has 171 people in the front coaches and 523 people in the back coaches. How many people are on the train?
  37. 37.A train has 526 people in the front coaches and 269 people in the back coaches. How many people are on the train?
  38. 38.? − 182 = 644
  39. 39.? − 612 = 230
  40. 40.634 + 102 =

Answer key

  1. 420
  2. 378
  3. 244
  4. 630
  5. 481
  6. 255
  7. 267
  8. 683
  9. 422
  10. 932
  11. 375
  12. 974
  13. 575
  14. 570
  15. 878
  16. 442
  17. 74
  18. 960
  19. 439
  20. 532
  21. 192
  22. 896
  23. 402
  24. 873
  25. 976
  26. 310
  27. 337
  28. 481
  29. 956
  30. 215
  31. 620
  32. 344
  33. 782
  34. 368
  35. 928
  36. 694
  37. 795
  38. 826
  39. 842
  40. 736

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