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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 954 · 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. 1.428 − 234 =
  2. 2.? − 161 = 435
  3. 3.229 + 415 =
  4. 4.534 + ? = 809
  5. 5.796 − 182 =
  6. 6.A train has 210 people in the front coaches and 522 people in the back coaches. How many people are on the train?
  7. 7.A school has 729 children. 543 of them are girls. How many boys are there?
  8. 8.A school has 372 children. 176 of them are girls. How many boys are there?
  9. 9.887 + ? = 989
  10. 10.580 + 322 =
  11. 11.A school has 971 children. 236 of them are girls. How many boys are there?
  12. 12.254 − 182 =
  13. 13.A school has 304 children. 130 of them are girls. How many boys are there?
  14. 14.? + 360 = 678
  15. 15.A school has 372 children. 247 of them are girls. How many boys are there?
  16. 16.272 + 215 =
  17. 17.A train has 304 people in the front coaches and 681 people in the back coaches. How many people are on the train?
  18. 18.565 − ? = 51
  19. 19.217 + 765 =
  20. 20.A school has 499 children. 317 of them are girls. How many boys are there?
  21. 21.782 − ? = 210
  22. 22.A school has 205 children. 109 of them are girls. How many boys are there?
  23. 23.299 + 358 =
  24. 24.820 + 141 =
  25. 25.A train has 337 people in the front coaches and 204 people in the back coaches. How many people are on the train?
  26. 26.111 + 589 =
  27. 27.358 − 128 =
  28. 28.A train has 155 people in the front coaches and 693 people in the back coaches. How many people are on the train?
  29. 29.992 − 806 =
  30. 30.330 − ? = 104
  31. 31.? + 259 = 462
  32. 32.884 + 115 =
  33. 33.518 − 383 =
  34. 34.A train has 752 people in the front coaches and 169 people in the back coaches. How many people are on the train?
  35. 35.901 − 336 =
  36. 36.A train has 645 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  37. 37.? − 492 = 430
  38. 38.A school has 849 children. 305 of them are girls. How many boys are there?
  39. 39.A school has 846 children. 324 of them are girls. How many boys are there?
  40. 40.A train has 236 people in the front coaches and 614 people in the back coaches. How many people are on the train?

Answer key

  1. 194
  2. 596
  3. 644
  4. 275
  5. 614
  6. 732
  7. 186
  8. 196
  9. 102
  10. 902
  11. 735
  12. 72
  13. 174
  14. 318
  15. 125
  16. 487
  17. 985
  18. 514
  19. 982
  20. 182
  21. 572
  22. 96
  23. 657
  24. 961
  25. 541
  26. 700
  27. 230
  28. 848
  29. 186
  30. 226
  31. 203
  32. 999
  33. 135
  34. 921
  35. 565
  36. 789
  37. 922
  38. 544
  39. 522
  40. 850

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