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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 237 · 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. 1.458 − 116 =
  2. 2.A train has 155 people in the front coaches and 177 people in the back coaches. How many people are on the train?
  3. 3.851 + ? = 980
  4. 4.A school has 681 children. 555 of them are girls. How many boys are there?
  5. 5.? + 217 = 347
  6. 6.836 + 145 =
  7. 7.A school has 505 children. 442 of them are girls. How many boys are there?
  8. 8.391 + ? = 921
  9. 9.984 − 416 =
  10. 10.708 − 214 =
  11. 11.A school has 946 children. 706 of them are girls. How many boys are there?
  12. 12.855 − 332 =
  13. 13.A train has 580 people in the front coaches and 279 people in the back coaches. How many people are on the train?
  14. 14.A school has 545 children. 264 of them are girls. How many boys are there?
  15. 15.A train has 231 people in the front coaches and 322 people in the back coaches. How many people are on the train?
  16. 16.A school has 974 children. 761 of them are girls. How many boys are there?
  17. 17.211 + 738 =
  18. 18.A school has 633 children. 162 of them are girls. How many boys are there?
  19. 19.207 + 657 =
  20. 20.218 − 133 =
  21. 21.A train has 273 people in the front coaches and 722 people in the back coaches. How many people are on the train?
  22. 22.A school has 882 children. 156 of them are girls. How many boys are there?
  23. 23.802 + ? = 960
  24. 24.247 − ? = 82
  25. 25.A train has 288 people in the front coaches and 431 people in the back coaches. How many people are on the train?
  26. 26.999 − 105 =
  27. 27.A school has 252 children. 147 of them are girls. How many boys are there?
  28. 28.? + 815 = 953
  29. 29.619 + 275 =
  30. 30.827 + 132 =
  31. 31.360 − 240 =
  32. 32.A train has 472 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  33. 33.A train has 721 people in the front coaches and 153 people in the back coaches. How many people are on the train?
  34. 34.A school has 463 children. 123 of them are girls. How many boys are there?
  35. 35.788 − 131 =
  36. 36.A school has 893 children. 843 of them are girls. How many boys are there?
  37. 37.A train has 841 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  38. 38.239 − 222 =
  39. 39.? − 247 = 197
  40. 40.657 − 555 =

Answer key

  1. 342
  2. 332
  3. 129
  4. 126
  5. 130
  6. 981
  7. 63
  8. 530
  9. 568
  10. 494
  11. 240
  12. 523
  13. 859
  14. 281
  15. 553
  16. 213
  17. 949
  18. 471
  19. 864
  20. 85
  21. 995
  22. 726
  23. 158
  24. 165
  25. 719
  26. 894
  27. 105
  28. 138
  29. 894
  30. 959
  31. 120
  32. 749
  33. 874
  34. 340
  35. 657
  36. 50
  37. 987
  38. 17
  39. 444
  40. 102

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