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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 716 · 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.A train has 836 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  2. 2.? − 311 = 281
  3. 3.A school has 884 children. 202 of them are girls. How many boys are there?
  4. 4.828 + 107 =
  5. 5.A train has 331 people in the front coaches and 249 people in the back coaches. How many people are on the train?
  6. 6.230 − ? = 102
  7. 7.576 + 102 =
  8. 8.891 − ? = 300
  9. 9.588 + 288 =
  10. 10.A train has 751 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  11. 11.A train has 616 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  12. 12.758 − 296 =
  13. 13.695 − 262 =
  14. 14.A school has 853 children. 300 of them are girls. How many boys are there?
  15. 15.A train has 408 people in the front coaches and 350 people in the back coaches. How many people are on the train?
  16. 16.379 + ? = 508
  17. 17.? − 189 = 231
  18. 18.A train has 574 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  19. 19.697 − 676 =
  20. 20.281 − 200 =
  21. 21.380 − 119 =
  22. 22.A school has 811 children. 573 of them are girls. How many boys are there?
  23. 23.846 + ? = 977
  24. 24.A train has 408 people in the front coaches and 559 people in the back coaches. How many people are on the train?
  25. 25.A school has 320 children. 284 of them are girls. How many boys are there?
  26. 26.205 + 615 =
  27. 27.874 − ? = 704
  28. 28.345 + 469 =
  29. 29.215 + 208 =
  30. 30.A train has 515 people in the front coaches and 314 people in the back coaches. How many people are on the train?
  31. 31.561 − 536 =
  32. 32.293 + 468 =
  33. 33.? + 415 = 738
  34. 34.480 + 174 =
  35. 35.204 + 220 =
  36. 36.253 + 654 =
  37. 37.A school has 879 children. 539 of them are girls. How many boys are there?
  38. 38.804 − 664 =
  39. 39.582 + 268 =
  40. 40.A school has 407 children. 196 of them are girls. How many boys are there?

Answer key

  1. 943
  2. 592
  3. 682
  4. 935
  5. 580
  6. 128
  7. 678
  8. 591
  9. 876
  10. 867
  11. 754
  12. 462
  13. 433
  14. 553
  15. 758
  16. 129
  17. 420
  18. 718
  19. 21
  20. 81
  21. 261
  22. 238
  23. 131
  24. 967
  25. 36
  26. 820
  27. 170
  28. 814
  29. 423
  30. 829
  31. 25
  32. 761
  33. 323
  34. 654
  35. 424
  36. 907
  37. 340
  38. 140
  39. 850
  40. 211

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