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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 866 · 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. 1.276 − 165 =
  2. 2.A school has 339 children. 302 of them are girls. How many boys are there?
  3. 3.? − 232 = 93
  4. 4.783 − 271 =
  5. 5.? + 121 = 720
  6. 6.324 + ? = 450
  7. 7.A school has 247 children. 145 of them are girls. How many boys are there?
  8. 8.? − 137 = 151
  9. 9.? + 295 = 487
  10. 10.A train has 261 people in the front coaches and 393 people in the back coaches. How many people are on the train?
  11. 11.967 − 934 =
  12. 12.274 + 322 =
  13. 13.? − 800 = 51
  14. 14.A school has 859 children. 283 of them are girls. How many boys are there?
  15. 15.559 + 156 =
  16. 16.259 + ? = 696
  17. 17.765 − 316 =
  18. 18.A train has 598 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  19. 19.410 − 264 =
  20. 20.A train has 718 people in the front coaches and 254 people in the back coaches. How many people are on the train?
  21. 21.650 − ? = 134
  22. 22.? + 236 = 968
  23. 23.663 + ? = 833
  24. 24.369 − ? = 2
  25. 25.449 + 455 =
  26. 26.A train has 735 people in the front coaches and 157 people in the back coaches. How many people are on the train?
  27. 27.A train has 314 people in the front coaches and 536 people in the back coaches. How many people are on the train?
  28. 28.? + 682 = 895
  29. 29.A school has 795 children. 295 of them are girls. How many boys are there?
  30. 30.198 + ? = 329
  31. 31.A train has 631 people in the front coaches and 243 people in the back coaches. How many people are on the train?
  32. 32.222 + 546 =
  33. 33.A train has 746 people in the front coaches and 195 people in the back coaches. How many people are on the train?
  34. 34.A school has 408 children. 400 of them are girls. How many boys are there?
  35. 35.731 + 126 =
  36. 36.422 − 220 =
  37. 37.700 − 409 =
  38. 38.308 + 120 =
  39. 39.827 − 772 =
  40. 40.A school has 340 children. 147 of them are girls. How many boys are there?

Answer key

  1. 111
  2. 37
  3. 325
  4. 512
  5. 599
  6. 126
  7. 102
  8. 288
  9. 192
  10. 654
  11. 33
  12. 596
  13. 851
  14. 576
  15. 715
  16. 437
  17. 449
  18. 752
  19. 146
  20. 972
  21. 516
  22. 732
  23. 170
  24. 367
  25. 904
  26. 892
  27. 850
  28. 213
  29. 500
  30. 131
  31. 874
  32. 768
  33. 941
  34. 8
  35. 857
  36. 202
  37. 291
  38. 428
  39. 55
  40. 193

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