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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 417 · 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. 1.324 − 279 =
  2. 2.518 − 485 =
  3. 3.227 − 181 =
  4. 4.508 − 498 =
  5. 5.64 − 44 =
  6. 6.1024 − 991 =
  7. 7.507 − 479 =
  8. 8.109 − 73 =
  9. 9.102 − 95 =
  10. 10.82 − 66 =
  11. 11.1020 − 988 =
  12. 12.220 − 192 =
  13. 13.1010 − 997 =
  14. 14.102 − 75 =
  15. 15.507 − 487 =
  16. 16.106 − 66 =
  17. 17.315 − 286 =
  18. 18.93 − 66 =
  19. 19.59 − 39 =
  20. 20.518 − 495 =
  21. 21.118 − 91 =
  22. 22.85 − 65 =
  23. 23.82 − 61 =
  24. 24.1028 − 997 =
  25. 25.516 − 498 =
  26. 26.1024 − 994 =
  27. 27.52 − 37 =
  28. 28.215 − 197 =
  29. 29.104 − 56 =
  30. 30.128 − 81 =
  31. 31.1001 − 996 =
  32. 32.1024 − 997 =
  33. 33.316 − 291 =
  34. 34.124 − 75 =
  35. 35.112 − 98 =
  36. 36.86 − 78 =
  37. 37.123 − 75 =
  38. 38.80 − 30 =
  39. 39.82 − 70 =
  40. 40.72 − 34 =

Answer key

  1. 45
  2. 33
  3. 46
  4. 10
  5. 20
  6. 33
  7. 28
  8. 36
  9. 7
  10. 16
  11. 32
  12. 28
  13. 13
  14. 27
  15. 20
  16. 40
  17. 29
  18. 27
  19. 20
  20. 23
  21. 27
  22. 20
  23. 21
  24. 31
  25. 18
  26. 30
  27. 15
  28. 18
  29. 48
  30. 47
  31. 5
  32. 27
  33. 25
  34. 49
  35. 14
  36. 8
  37. 48
  38. 50
  39. 12
  40. 38

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