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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 929 · 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 240 people in the front coaches and 257 people in the back coaches. How many people are on the train?
  2. 2.463 − ? = 261
  3. 3.A train has 328 people in the front coaches and 593 people in the back coaches. How many people are on the train?
  4. 4.937 − 232 =
  5. 5.? + 710 = 856
  6. 6.718 − 520 =
  7. 7.A school has 781 children. 544 of them are girls. How many boys are there?
  8. 8.A train has 156 people in the front coaches and 297 people in the back coaches. How many people are on the train?
  9. 9.299 − 185 =
  10. 10.230 − 119 =
  11. 11.A school has 758 children. 741 of them are girls. How many boys are there?
  12. 12.? + 242 = 791
  13. 13.295 − 171 =
  14. 14.A school has 643 children. 165 of them are girls. How many boys are there?
  15. 15.460 + 310 =
  16. 16.A school has 892 children. 873 of them are girls. How many boys are there?
  17. 17.A school has 246 children. 102 of them are girls. How many boys are there?
  18. 18.A school has 229 children. 134 of them are girls. How many boys are there?
  19. 19.A school has 386 children. 217 of them are girls. How many boys are there?
  20. 20.A school has 279 children. 247 of them are girls. How many boys are there?
  21. 21.A train has 721 people in the front coaches and 226 people in the back coaches. How many people are on the train?
  22. 22.A school has 622 children. 325 of them are girls. How many boys are there?
  23. 23.264 − 242 =
  24. 24.A train has 227 people in the front coaches and 345 people in the back coaches. How many people are on the train?
  25. 25.A school has 467 children. 177 of them are girls. How many boys are there?
  26. 26.A school has 664 children. 184 of them are girls. How many boys are there?
  27. 27.A school has 901 children. 240 of them are girls. How many boys are there?
  28. 28.250 + ? = 471
  29. 29.831 − ? = 654
  30. 30.A school has 251 children. 153 of them are girls. How many boys are there?
  31. 31.237 − 170 =
  32. 32.A train has 839 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  33. 33.818 − 131 =
  34. 34.570 − ? = 111
  35. 35.627 + 360 =
  36. 36.209 + 788 =
  37. 37.410 + 439 =
  38. 38.503 − 395 =
  39. 39.713 + 240 =
  40. 40.A train has 183 people in the front coaches and 514 people in the back coaches. How many people are on the train?

Answer key

  1. 497
  2. 202
  3. 921
  4. 705
  5. 146
  6. 198
  7. 237
  8. 453
  9. 114
  10. 111
  11. 17
  12. 549
  13. 124
  14. 478
  15. 770
  16. 19
  17. 144
  18. 95
  19. 169
  20. 32
  21. 947
  22. 297
  23. 22
  24. 572
  25. 290
  26. 480
  27. 661
  28. 221
  29. 177
  30. 98
  31. 67
  32. 998
  33. 687
  34. 459
  35. 987
  36. 997
  37. 849
  38. 108
  39. 953
  40. 697

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