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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 304 · 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.? + 684 = 931
  2. 2.795 − 316 =
  3. 3.695 − 168 =
  4. 4.? + 391 = 626
  5. 5.164 + 464 =
  6. 6.? − 270 = 278
  7. 7.851 + 144 =
  8. 8.594 − 228 =
  9. 9.838 + ? = 987
  10. 10.672 − 101 =
  11. 11.211 + 562 =
  12. 12.A train has 450 people in the front coaches and 310 people in the back coaches. How many people are on the train?
  13. 13.233 − 180 =
  14. 14.107 + 573 =
  15. 15.483 − 430 =
  16. 16.342 − 322 =
  17. 17.706 + 161 =
  18. 18.225 − 119 =
  19. 19.A train has 122 people in the front coaches and 522 people in the back coaches. How many people are on the train?
  20. 20.? − 662 = 38
  21. 21.A school has 302 children. 275 of them are girls. How many boys are there?
  22. 22.495 − 133 =
  23. 23.262 − 129 =
  24. 24.802 − 276 =
  25. 25.331 + 330 =
  26. 26.A train has 683 people in the front coaches and 256 people in the back coaches. How many people are on the train?
  27. 27.? + 663 = 942
  28. 28.648 + 126 =
  29. 29.? + 171 = 612
  30. 30.A train has 771 people in the front coaches and 200 people in the back coaches. How many people are on the train?
  31. 31.? − 568 = 81
  32. 32.? + 776 = 900
  33. 33.A train has 245 people in the front coaches and 214 people in the back coaches. How many people are on the train?
  34. 34.973 − ? = 576
  35. 35.269 − 116 =
  36. 36.? + 204 = 538
  37. 37.A train has 264 people in the front coaches and 689 people in the back coaches. How many people are on the train?
  38. 38.A train has 446 people in the front coaches and 177 people in the back coaches. How many people are on the train?
  39. 39.A train has 122 people in the front coaches and 288 people in the back coaches. How many people are on the train?
  40. 40.A school has 833 children. 776 of them are girls. How many boys are there?

Answer key

  1. 247
  2. 479
  3. 527
  4. 235
  5. 628
  6. 548
  7. 995
  8. 366
  9. 149
  10. 571
  11. 773
  12. 760
  13. 53
  14. 680
  15. 53
  16. 20
  17. 867
  18. 106
  19. 644
  20. 700
  21. 27
  22. 362
  23. 133
  24. 526
  25. 661
  26. 939
  27. 279
  28. 774
  29. 441
  30. 971
  31. 649
  32. 124
  33. 459
  34. 397
  35. 153
  36. 334
  37. 953
  38. 623
  39. 410
  40. 57

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