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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 678 · 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. 1.57 − 30 =
  2. 2.95 − 73 =
  3. 3.307 − 291 =
  4. 4.227 − 195 =
  5. 5.55 − 37 =
  6. 6.125 − 94 =
  7. 7.81 − 64 =
  8. 8.516 − 494 =
  9. 9.516 − 498 =
  10. 10.88 − 76 =
  11. 11.312 − 282 =
  12. 12.209 − 193 =
  13. 13.82 − 76 =
  14. 14.202 − 195 =
  15. 15.103 − 77 =
  16. 16.107 − 68 =
  17. 17.106 − 67 =
  18. 18.102 − 84 =
  19. 19.1025 − 980 =
  20. 20.114 − 83 =
  21. 21.317 − 291 =
  22. 22.105 − 72 =
  23. 23.214 − 185 =
  24. 24.113 − 91 =
  25. 25.87 − 75 =
  26. 26.73 − 26 =
  27. 27.123 − 81 =
  28. 28.108 − 76 =
  29. 29.224 − 198 =
  30. 30.75 − 33 =
  31. 31.73 − 42 =
  32. 32.1019 − 977 =
  33. 33.1006 − 994 =
  34. 34.74 − 36 =
  35. 35.318 − 297 =
  36. 36.127 − 77 =
  37. 37.100 − 57 =
  38. 38.109 − 90 =
  39. 39.521 − 478 =
  40. 40.101 − 72 =

Answer key

  1. 27
  2. 22
  3. 16
  4. 32
  5. 18
  6. 31
  7. 17
  8. 22
  9. 18
  10. 12
  11. 30
  12. 16
  13. 6
  14. 7
  15. 26
  16. 39
  17. 39
  18. 18
  19. 45
  20. 31
  21. 26
  22. 33
  23. 29
  24. 22
  25. 12
  26. 47
  27. 42
  28. 32
  29. 26
  30. 42
  31. 31
  32. 42
  33. 12
  34. 38
  35. 21
  36. 50
  37. 43
  38. 19
  39. 43
  40. 29

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