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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 840 · 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. 1.84 − 74 =
  2. 2.1010 − 994 =
  3. 3.96 − 72 =
  4. 4.104 − 82 =
  5. 5.1010 − 981 =
  6. 6.1022 − 994 =
  7. 7.317 − 284 =
  8. 8.113 − 86 =
  9. 9.84 − 77 =
  10. 10.318 − 281 =
  11. 11.110 − 62 =
  12. 12.310 − 288 =
  13. 13.228 − 177 =
  14. 14.101 − 93 =
  15. 15.123 − 83 =
  16. 16.1028 − 992 =
  17. 17.204 − 195 =
  18. 18.1004 − 990 =
  19. 19.513 − 484 =
  20. 20.108 − 58 =
  21. 21.53 − 45 =
  22. 22.123 − 92 =
  23. 23.323 − 278 =
  24. 24.1005 − 981 =
  25. 25.306 − 288 =
  26. 26.1021 − 985 =
  27. 27.102 − 77 =
  28. 28.507 − 493 =
  29. 29.109 − 73 =
  30. 30.1020 − 995 =
  31. 31.318 − 295 =
  32. 32.1013 − 982 =
  33. 33.313 − 275 =
  34. 34.103 − 79 =
  35. 35.102 − 76 =
  36. 36.83 − 57 =
  37. 37.124 − 87 =
  38. 38.104 − 60 =
  39. 39.63 − 33 =
  40. 40.112 − 88 =

Answer key

  1. 10
  2. 16
  3. 24
  4. 22
  5. 29
  6. 28
  7. 33
  8. 27
  9. 7
  10. 37
  11. 48
  12. 22
  13. 51
  14. 8
  15. 40
  16. 36
  17. 9
  18. 14
  19. 29
  20. 50
  21. 8
  22. 31
  23. 45
  24. 24
  25. 18
  26. 36
  27. 25
  28. 14
  29. 36
  30. 25
  31. 23
  32. 31
  33. 38
  34. 24
  35. 26
  36. 26
  37. 37
  38. 44
  39. 30
  40. 24

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