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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 540 · 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. 1.387 + ? = 927
  2. 2.A train has 396 people in the front coaches and 297 people in the back coaches. How many people are on the train?
  3. 3.686 − 120 =
  4. 4.955 − ? = 415
  5. 5.375 + ? = 727
  6. 6.? + 186 = 682
  7. 7.839 + 147 =
  8. 8.A train has 449 people in the front coaches and 377 people in the back coaches. How many people are on the train?
  9. 9.953 − 371 =
  10. 10.A school has 927 children. 909 of them are girls. How many boys are there?
  11. 11.A train has 384 people in the front coaches and 550 people in the back coaches. How many people are on the train?
  12. 12.A train has 894 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  13. 13.680 + 233 =
  14. 14.308 + 661 =
  15. 15.331 − 318 =
  16. 16.A school has 274 children. 106 of them are girls. How many boys are there?
  17. 17.A train has 746 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  18. 18.481 − 142 =
  19. 19.A school has 641 children. 206 of them are girls. How many boys are there?
  20. 20.726 + 194 =
  21. 21.292 + 132 =
  22. 22.A school has 580 children. 514 of them are girls. How many boys are there?
  23. 23.334 + 279 =
  24. 24.A school has 995 children. 706 of them are girls. How many boys are there?
  25. 25.A school has 554 children. 354 of them are girls. How many boys are there?
  26. 26.A train has 846 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  27. 27.778 + 163 =
  28. 28.299 − 246 =
  29. 29.A school has 220 children. 195 of them are girls. How many boys are there?
  30. 30.A school has 749 children. 141 of them are girls. How many boys are there?
  31. 31.491 − 421 =
  32. 32.480 + 328 =
  33. 33.A school has 279 children. 126 of them are girls. How many boys are there?
  34. 34.277 + ? = 980
  35. 35.A train has 836 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  36. 36.245 − ? = 32
  37. 37.A school has 578 children. 399 of them are girls. How many boys are there?
  38. 38.A school has 897 children. 143 of them are girls. How many boys are there?
  39. 39.685 − 212 =
  40. 40.795 − 698 =

Answer key

  1. 540
  2. 693
  3. 566
  4. 540
  5. 352
  6. 496
  7. 986
  8. 826
  9. 582
  10. 18
  11. 934
  12. 995
  13. 913
  14. 969
  15. 13
  16. 168
  17. 959
  18. 339
  19. 435
  20. 920
  21. 424
  22. 66
  23. 613
  24. 289
  25. 200
  26. 995
  27. 941
  28. 53
  29. 25
  30. 608
  31. 70
  32. 808
  33. 153
  34. 703
  35. 975
  36. 213
  37. 179
  38. 754
  39. 473
  40. 97

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