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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 771 · 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 school has 889 children. 113 of them are girls. How many boys are there?
  2. 2.886 − 589 =
  3. 3.335 + 531 =
  4. 4.? − 112 = 115
  5. 5.? + 566 = 882
  6. 6.A train has 613 people in the front coaches and 167 people in the back coaches. How many people are on the train?
  7. 7.693 + 137 =
  8. 8.635 + 228 =
  9. 9.180 + 136 =
  10. 10.781 − 286 =
  11. 11.525 − 466 =
  12. 12.A school has 756 children. 197 of them are girls. How many boys are there?
  13. 13.? + 476 = 810
  14. 14.235 − 126 =
  15. 15.519 + ? = 801
  16. 16.259 + 142 =
  17. 17.468 − 202 =
  18. 18.? + 457 = 598
  19. 19.? + 235 = 424
  20. 20.A school has 209 children. 106 of them are girls. How many boys are there?
  21. 21.466 + ? = 875
  22. 22.820 + 176 =
  23. 23.A school has 794 children. 248 of them are girls. How many boys are there?
  24. 24.A train has 463 people in the front coaches and 315 people in the back coaches. How many people are on the train?
  25. 25.A train has 632 people in the front coaches and 263 people in the back coaches. How many people are on the train?
  26. 26.349 + 282 =
  27. 27.A school has 448 children. 174 of them are girls. How many boys are there?
  28. 28.A train has 752 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  29. 29.A school has 680 children. 254 of them are girls. How many boys are there?
  30. 30.? + 133 = 294
  31. 31.A train has 322 people in the front coaches and 538 people in the back coaches. How many people are on the train?
  32. 32.863 − ? = 85
  33. 33.? + 598 = 990
  34. 34.A school has 623 children. 479 of them are girls. How many boys are there?
  35. 35.598 + 219 =
  36. 36.A train has 311 people in the front coaches and 381 people in the back coaches. How many people are on the train?
  37. 37.? + 216 = 546
  38. 38.? − 188 = 455
  39. 39.954 − 264 =
  40. 40.A train has 477 people in the front coaches and 171 people in the back coaches. How many people are on the train?

Answer key

  1. 776
  2. 297
  3. 866
  4. 227
  5. 316
  6. 780
  7. 830
  8. 863
  9. 316
  10. 495
  11. 59
  12. 559
  13. 334
  14. 109
  15. 282
  16. 401
  17. 266
  18. 141
  19. 189
  20. 103
  21. 409
  22. 996
  23. 546
  24. 778
  25. 895
  26. 631
  27. 274
  28. 920
  29. 426
  30. 161
  31. 860
  32. 778
  33. 392
  34. 144
  35. 817
  36. 692
  37. 330
  38. 643
  39. 690
  40. 648

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