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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 860 · 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. 1.351 − 193 =
  2. 2.? − 571 = 7
  3. 3.315 + 113 =
  4. 4.280 + 480 =
  5. 5.992 − 580 =
  6. 6.443 − ? = 150
  7. 7.A school has 647 children. 490 of them are girls. How many boys are there?
  8. 8.? + 755 = 968
  9. 9.A train has 419 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  10. 10.265 + ? = 568
  11. 11.A school has 737 children. 103 of them are girls. How many boys are there?
  12. 12.444 + ? = 664
  13. 13.274 + 219 =
  14. 14.A school has 240 children. 124 of them are girls. How many boys are there?
  15. 15.? − 384 = 118
  16. 16.620 − ? = 114
  17. 17.673 + 215 =
  18. 18.602 + 171 =
  19. 19.A train has 241 people in the front coaches and 557 people in the back coaches. How many people are on the train?
  20. 20.374 − 237 =
  21. 21.A train has 411 people in the front coaches and 410 people in the back coaches. How many people are on the train?
  22. 22.296 − 270 =
  23. 23.A train has 666 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  24. 24.A train has 138 people in the front coaches and 137 people in the back coaches. How many people are on the train?
  25. 25.? − 549 = 100
  26. 26.A school has 467 children. 110 of them are girls. How many boys are there?
  27. 27.A train has 347 people in the front coaches and 600 people in the back coaches. How many people are on the train?
  28. 28.280 + 527 =
  29. 29.? + 822 = 971
  30. 30.777 − 550 =
  31. 31.A train has 839 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  32. 32.? − 165 = 40
  33. 33.433 + 320 =
  34. 34.A train has 535 people in the front coaches and 161 people in the back coaches. How many people are on the train?
  35. 35.A train has 557 people in the front coaches and 434 people in the back coaches. How many people are on the train?
  36. 36.A school has 266 children. 214 of them are girls. How many boys are there?
  37. 37.651 + ? = 953
  38. 38.895 + 102 =
  39. 39.A school has 918 children. 725 of them are girls. How many boys are there?
  40. 40.312 + 210 =

Answer key

  1. 158
  2. 578
  3. 428
  4. 760
  5. 412
  6. 293
  7. 157
  8. 213
  9. 570
  10. 303
  11. 634
  12. 220
  13. 493
  14. 116
  15. 502
  16. 506
  17. 888
  18. 773
  19. 798
  20. 137
  21. 821
  22. 26
  23. 853
  24. 275
  25. 649
  26. 357
  27. 947
  28. 807
  29. 149
  30. 227
  31. 948
  32. 205
  33. 753
  34. 696
  35. 991
  36. 52
  37. 302
  38. 997
  39. 193
  40. 522

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