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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 383 · 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. 1.658 + ? = 825
  2. 2.617 − 186 =
  3. 3.748 + ? = 942
  4. 4.364 + 176 =
  5. 5.468 − ? = 299
  6. 6.528 + ? = 634
  7. 7.515 − 255 =
  8. 8.407 + 350 =
  9. 9.? + 474 = 666
  10. 10.620 − 403 =
  11. 11.A school has 969 children. 954 of them are girls. How many boys are there?
  12. 12.487 + 512 =
  13. 13.A train has 732 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  14. 14.? − 184 = 28
  15. 15.612 + 263 =
  16. 16.A school has 751 children. 158 of them are girls. How many boys are there?
  17. 17.A school has 593 children. 125 of them are girls. How many boys are there?
  18. 18.A train has 804 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  19. 19.? + 340 = 589
  20. 20.787 + 178 =
  21. 21.899 + 100 =
  22. 22.? + 200 = 375
  23. 23.A train has 393 people in the front coaches and 241 people in the back coaches. How many people are on the train?
  24. 24.? + 684 = 824
  25. 25.A school has 730 children. 109 of them are girls. How many boys are there?
  26. 26.166 + 324 =
  27. 27.340 + 110 =
  28. 28.A school has 300 children. 100 of them are girls. How many boys are there?
  29. 29.A school has 320 children. 208 of them are girls. How many boys are there?
  30. 30.428 − ? = 179
  31. 31.A train has 718 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  32. 32.? + 258 = 539
  33. 33.107 + ? = 917
  34. 34.A train has 643 people in the front coaches and 227 people in the back coaches. How many people are on the train?
  35. 35.780 − 767 =
  36. 36.A train has 136 people in the front coaches and 611 people in the back coaches. How many people are on the train?
  37. 37.? − 165 = 354
  38. 38.? + 179 = 971
  39. 39.A school has 445 children. 435 of them are girls. How many boys are there?
  40. 40.A train has 887 people in the front coaches and 105 people in the back coaches. How many people are on the train?

Answer key

  1. 167
  2. 431
  3. 194
  4. 540
  5. 169
  6. 106
  7. 260
  8. 757
  9. 192
  10. 217
  11. 15
  12. 999
  13. 832
  14. 212
  15. 875
  16. 593
  17. 468
  18. 924
  19. 249
  20. 965
  21. 999
  22. 175
  23. 634
  24. 140
  25. 621
  26. 490
  27. 450
  28. 200
  29. 112
  30. 249
  31. 867
  32. 281
  33. 810
  34. 870
  35. 13
  36. 747
  37. 519
  38. 792
  39. 10
  40. 992

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