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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 201 · 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. 1.556 + 401 =
  2. 2.A train has 419 people in the front coaches and 534 people in the back coaches. How many people are on the train?
  3. 3.361 − 193 =
  4. 4.264 − 194 =
  5. 5.608 + 268 =
  6. 6.608 + 191 =
  7. 7.A train has 749 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  8. 8.391 − 278 =
  9. 9.A school has 254 children. 120 of them are girls. How many boys are there?
  10. 10.315 − 306 =
  11. 11.349 − 164 =
  12. 12.A school has 638 children. 197 of them are girls. How many boys are there?
  13. 13.A school has 595 children. 262 of them are girls. How many boys are there?
  14. 14.A train has 818 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  15. 15.? + 669 = 975
  16. 16.690 − 531 =
  17. 17.? + 182 = 673
  18. 18.647 + 152 =
  19. 19.272 + 434 =
  20. 20.? + 257 = 558
  21. 21.? − 368 = 233
  22. 22.A school has 802 children. 422 of them are girls. How many boys are there?
  23. 23.A train has 168 people in the front coaches and 551 people in the back coaches. How many people are on the train?
  24. 24.A train has 515 people in the front coaches and 403 people in the back coaches. How many people are on the train?
  25. 25.A train has 481 people in the front coaches and 193 people in the back coaches. How many people are on the train?
  26. 26.304 − ? = 12
  27. 27.220 − ? = 31
  28. 28.281 − 188 =
  29. 29.658 + 334 =
  30. 30.? − 728 = 32
  31. 31.A school has 681 children. 576 of them are girls. How many boys are there?
  32. 32.531 − 265 =
  33. 33.507 + 112 =
  34. 34.875 − 318 =
  35. 35.A school has 618 children. 203 of them are girls. How many boys are there?
  36. 36.488 + 260 =
  37. 37.A train has 576 people in the front coaches and 344 people in the back coaches. How many people are on the train?
  38. 38.A school has 326 children. 171 of them are girls. How many boys are there?
  39. 39.A school has 899 children. 104 of them are girls. How many boys are there?
  40. 40.394 − 264 =

Answer key

  1. 957
  2. 953
  3. 168
  4. 70
  5. 876
  6. 799
  7. 917
  8. 113
  9. 134
  10. 9
  11. 185
  12. 441
  13. 333
  14. 951
  15. 306
  16. 159
  17. 491
  18. 799
  19. 706
  20. 301
  21. 601
  22. 380
  23. 719
  24. 918
  25. 674
  26. 292
  27. 189
  28. 93
  29. 992
  30. 760
  31. 105
  32. 266
  33. 619
  34. 557
  35. 415
  36. 748
  37. 920
  38. 155
  39. 795
  40. 130

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