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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 962 · 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. 1.210 − 150 =
  2. 2.194 + 518 =
  3. 3.? − 271 = 17
  4. 4.A school has 229 children. 130 of them are girls. How many boys are there?
  5. 5.A school has 222 children. 157 of them are girls. How many boys are there?
  6. 6.649 − 245 =
  7. 7.681 + 209 =
  8. 8.? + 240 = 431
  9. 9.A school has 221 children. 129 of them are girls. How many boys are there?
  10. 10.A train has 295 people in the front coaches and 171 people in the back coaches. How many people are on the train?
  11. 11.604 − 564 =
  12. 12.? + 197 = 382
  13. 13.A train has 562 people in the front coaches and 375 people in the back coaches. How many people are on the train?
  14. 14.A train has 323 people in the front coaches and 524 people in the back coaches. How many people are on the train?
  15. 15.331 + 489 =
  16. 16.787 + 130 =
  17. 17.A train has 629 people in the front coaches and 212 people in the back coaches. How many people are on the train?
  18. 18.A school has 243 children. 109 of them are girls. How many boys are there?
  19. 19.A train has 703 people in the front coaches and 233 people in the back coaches. How many people are on the train?
  20. 20.603 − ? = 426
  21. 21.370 + 237 =
  22. 22.A school has 407 children. 337 of them are girls. How many boys are there?
  23. 23.A train has 760 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  24. 24.A train has 659 people in the front coaches and 185 people in the back coaches. How many people are on the train?
  25. 25.A train has 612 people in the front coaches and 164 people in the back coaches. How many people are on the train?
  26. 26.200 + ? = 540
  27. 27.873 + ? = 976
  28. 28.A school has 638 children. 192 of them are girls. How many boys are there?
  29. 29.A school has 336 children. 277 of them are girls. How many boys are there?
  30. 30.A school has 464 children. 150 of them are girls. How many boys are there?
  31. 31.? − 166 = 47
  32. 32.391 + 261 =
  33. 33.354 − 208 =
  34. 34.? + 160 = 738
  35. 35.A school has 638 children. 410 of them are girls. How many boys are there?
  36. 36.389 + ? = 840
  37. 37.A school has 445 children. 250 of them are girls. How many boys are there?
  38. 38.545 − 159 =
  39. 39.A train has 374 people in the front coaches and 271 people in the back coaches. How many people are on the train?
  40. 40.541 + ? = 794

Answer key

  1. 60
  2. 712
  3. 288
  4. 99
  5. 65
  6. 404
  7. 890
  8. 191
  9. 92
  10. 466
  11. 40
  12. 185
  13. 937
  14. 847
  15. 820
  16. 917
  17. 841
  18. 134
  19. 936
  20. 177
  21. 607
  22. 70
  23. 908
  24. 844
  25. 776
  26. 340
  27. 103
  28. 446
  29. 59
  30. 314
  31. 213
  32. 652
  33. 146
  34. 578
  35. 228
  36. 451
  37. 195
  38. 386
  39. 645
  40. 253

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