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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 913 · 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. 1.116 − 89 =
  2. 2.54 − 41 =
  3. 3.83 − 58 =
  4. 4.107 − 98 =
  5. 5.1028 − 978 =
  6. 6.308 − 283 =
  7. 7.110 − 61 =
  8. 8.326 − 295 =
  9. 9.526 − 481 =
  10. 10.212 − 180 =
  11. 11.518 − 496 =
  12. 12.129 − 89 =
  13. 13.229 − 195 =
  14. 14.322 − 292 =
  15. 15.303 − 285 =
  16. 16.322 − 278 =
  17. 17.1021 − 985 =
  18. 18.115 − 75 =
  19. 19.63 − 36 =
  20. 20.1004 − 980 =
  21. 21.510 − 492 =
  22. 22.508 − 485 =
  23. 23.60 − 42 =
  24. 24.83 − 70 =
  25. 25.86 − 56 =
  26. 26.329 − 281 =
  27. 27.214 − 196 =
  28. 28.510 − 484 =
  29. 29.55 − 47 =
  30. 30.512 − 494 =
  31. 31.68 − 25 =
  32. 32.95 − 78 =
  33. 33.310 − 291 =
  34. 34.1027 − 991 =
  35. 35.216 − 182 =
  36. 36.102 − 95 =
  37. 37.1025 − 985 =
  38. 38.1018 − 990 =
  39. 39.104 − 97 =
  40. 40.208 − 181 =

Answer key

  1. 27
  2. 13
  3. 25
  4. 9
  5. 50
  6. 25
  7. 49
  8. 31
  9. 45
  10. 32
  11. 22
  12. 40
  13. 34
  14. 30
  15. 18
  16. 44
  17. 36
  18. 40
  19. 27
  20. 24
  21. 18
  22. 23
  23. 18
  24. 13
  25. 30
  26. 48
  27. 18
  28. 26
  29. 8
  30. 18
  31. 43
  32. 17
  33. 19
  34. 36
  35. 34
  36. 7
  37. 40
  38. 28
  39. 7
  40. 27

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