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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 667 · 40 questions
TalentJR

How to do it in your head (Count up): Start at the smaller number. Jump to the next ten, then the next hundred, then to the bigger number. Add up all the jumps.

NameDateTime takenScore ___ / 40
  1. 1.77 − 42 =
  2. 2.120 − 75 =
  3. 3.98 − 55 =
  4. 4.516 − 485 =
  5. 5.53 − 45 =
  6. 6.59 − 33 =
  7. 7.507 − 493 =
  8. 8.61 − 26 =
  9. 9.311 − 280 =
  10. 10.518 − 493 =
  11. 11.83 − 72 =
  12. 12.527 − 477 =
  13. 13.506 − 496 =
  14. 14.309 − 295 =
  15. 15.90 − 64 =
  16. 16.130 − 92 =
  17. 17.1023 − 993 =
  18. 18.104 − 85 =
  19. 19.312 − 291 =
  20. 20.127 − 81 =
  21. 21.325 − 292 =
  22. 22.530 − 487 =
  23. 23.97 − 71 =
  24. 24.213 − 195 =
  25. 25.326 − 287 =
  26. 26.518 − 483 =
  27. 27.1028 − 997 =
  28. 28.305 − 278 =
  29. 29.65 − 35 =
  30. 30.1024 − 993 =
  31. 31.1021 − 982 =
  32. 32.104 − 64 =
  33. 33.78 − 38 =
  34. 34.208 − 179 =
  35. 35.526 − 477 =
  36. 36.124 − 92 =
  37. 37.103 − 97 =
  38. 38.103 − 76 =
  39. 39.509 − 480 =
  40. 40.306 − 278 =

Answer key

  1. 35
  2. 45
  3. 43
  4. 31
  5. 8
  6. 26
  7. 14
  8. 35
  9. 31
  10. 25
  11. 11
  12. 50
  13. 10
  14. 14
  15. 26
  16. 38
  17. 30
  18. 19
  19. 21
  20. 46
  21. 33
  22. 43
  23. 26
  24. 18
  25. 39
  26. 35
  27. 31
  28. 27
  29. 30
  30. 31
  31. 39
  32. 40
  33. 40
  34. 29
  35. 49
  36. 32
  37. 6
  38. 27
  39. 29
  40. 28

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