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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 455 · 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. 1.731 − 354 =
  2. 2.A school has 339 children. 112 of them are girls. How many boys are there?
  3. 3.A train has 514 people in the front coaches and 389 people in the back coaches. How many people are on the train?
  4. 4.557 − ? = 275
  5. 5.A train has 156 people in the front coaches and 730 people in the back coaches. How many people are on the train?
  6. 6.? − 151 = 604
  7. 7.A train has 320 people in the front coaches and 661 people in the back coaches. How many people are on the train?
  8. 8.895 − 829 =
  9. 9.745 + 243 =
  10. 10.? + 781 = 882
  11. 11.A school has 811 children. 182 of them are girls. How many boys are there?
  12. 12.? + 112 = 706
  13. 13.469 − ? = 135
  14. 14.A train has 832 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  15. 15.A school has 458 children. 353 of them are girls. How many boys are there?
  16. 16.347 − 187 =
  17. 17.883 + ? = 999
  18. 18.A train has 201 people in the front coaches and 694 people in the back coaches. How many people are on the train?
  19. 19.695 − 590 =
  20. 20.502 + ? = 717
  21. 21.? + 492 = 912
  22. 22.A school has 767 children. 514 of them are girls. How many boys are there?
  23. 23.? − 440 = 66
  24. 24.509 + 370 =
  25. 25.? − 470 = 57
  26. 26.209 + 152 =
  27. 27.236 − 192 =
  28. 28.449 − 194 =
  29. 29.213 − 123 =
  30. 30.324 − 178 =
  31. 31.A school has 831 children. 213 of them are girls. How many boys are there?
  32. 32.? + 755 = 939
  33. 33.? + 566 = 689
  34. 34.A train has 732 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  35. 35.? + 103 = 583
  36. 36.169 + ? = 849
  37. 37.334 − 210 =
  38. 38.387 + ? = 896
  39. 39.562 − 233 =
  40. 40.A train has 438 people in the front coaches and 385 people in the back coaches. How many people are on the train?

Answer key

  1. 377
  2. 227
  3. 903
  4. 282
  5. 886
  6. 755
  7. 981
  8. 66
  9. 988
  10. 101
  11. 629
  12. 594
  13. 334
  14. 943
  15. 105
  16. 160
  17. 116
  18. 895
  19. 105
  20. 215
  21. 420
  22. 253
  23. 506
  24. 879
  25. 527
  26. 361
  27. 44
  28. 255
  29. 90
  30. 146
  31. 618
  32. 184
  33. 123
  34. 844
  35. 480
  36. 680
  37. 124
  38. 509
  39. 329
  40. 823

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