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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 836 · 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. 1.58 − 47 =
  2. 2.1013 − 998 =
  3. 3.1007 − 975 =
  4. 4.85 − 78 =
  5. 5.309 − 279 =
  6. 6.230 − 194 =
  7. 7.210 − 178 =
  8. 8.1019 − 988 =
  9. 9.83 − 59 =
  10. 10.91 − 58 =
  11. 11.69 − 36 =
  12. 12.1025 − 993 =
  13. 13.209 − 188 =
  14. 14.518 − 495 =
  15. 15.214 − 192 =
  16. 16.1029 − 995 =
  17. 17.315 − 283 =
  18. 18.212 − 175 =
  19. 19.77 − 47 =
  20. 20.64 − 25 =
  21. 21.72 − 45 =
  22. 22.310 − 292 =
  23. 23.510 − 490 =
  24. 24.110 − 62 =
  25. 25.90 − 68 =
  26. 26.1021 − 976 =
  27. 27.85 − 63 =
  28. 28.1012 − 980 =
  29. 29.125 − 86 =
  30. 30.503 − 495 =
  31. 31.330 − 278 =
  32. 32.80 − 40 =
  33. 33.308 − 289 =
  34. 34.1009 − 975 =
  35. 35.105 − 58 =
  36. 36.86 − 69 =
  37. 37.77 − 32 =
  38. 38.210 − 176 =
  39. 39.79 − 34 =
  40. 40.89 − 74 =

Answer key

  1. 11
  2. 15
  3. 32
  4. 7
  5. 30
  6. 36
  7. 32
  8. 31
  9. 24
  10. 33
  11. 33
  12. 32
  13. 21
  14. 23
  15. 22
  16. 34
  17. 32
  18. 37
  19. 30
  20. 39
  21. 27
  22. 18
  23. 20
  24. 48
  25. 22
  26. 45
  27. 22
  28. 32
  29. 39
  30. 8
  31. 52
  32. 40
  33. 19
  34. 34
  35. 47
  36. 17
  37. 45
  38. 34
  39. 45
  40. 15

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