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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 17 · 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. 1.78 − 42 =
  2. 2.312 − 275 =
  3. 3.518 − 490 =
  4. 4.123 − 77 =
  5. 5.1007 − 986 =
  6. 6.1023 − 989 =
  7. 7.510 − 487 =
  8. 8.86 − 78 =
  9. 9.81 − 58 =
  10. 10.107 − 71 =
  11. 11.306 − 282 =
  12. 12.227 − 182 =
  13. 13.56 − 44 =
  14. 14.530 − 475 =
  15. 15.125 − 93 =
  16. 16.80 − 37 =
  17. 17.110 − 92 =
  18. 18.128 − 93 =
  19. 19.314 − 294 =
  20. 20.1019 − 997 =
  21. 21.54 − 27 =
  22. 22.85 − 65 =
  23. 23.118 − 78 =
  24. 24.74 − 43 =
  25. 25.114 − 75 =
  26. 26.1002 − 985 =
  27. 27.77 − 47 =
  28. 28.519 − 498 =
  29. 29.120 − 98 =
  30. 30.1002 − 997 =
  31. 31.73 − 30 =
  32. 32.528 − 494 =
  33. 33.511 − 477 =
  34. 34.97 − 68 =
  35. 35.328 − 287 =
  36. 36.66 − 27 =
  37. 37.106 − 79 =
  38. 38.215 − 195 =
  39. 39.203 − 177 =
  40. 40.518 − 497 =

Answer key

  1. 36
  2. 37
  3. 28
  4. 46
  5. 21
  6. 34
  7. 23
  8. 8
  9. 23
  10. 36
  11. 24
  12. 45
  13. 12
  14. 55
  15. 32
  16. 43
  17. 18
  18. 35
  19. 20
  20. 22
  21. 27
  22. 20
  23. 40
  24. 31
  25. 39
  26. 17
  27. 30
  28. 21
  29. 22
  30. 5
  31. 43
  32. 34
  33. 34
  34. 29
  35. 41
  36. 39
  37. 27
  38. 20
  39. 26
  40. 21

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