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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 171 · 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. 1.80 − 39 =
  2. 2.110 − 91 =
  3. 3.1016 − 983 =
  4. 4.99 − 56 =
  5. 5.213 − 197 =
  6. 6.62 − 46 =
  7. 7.109 − 91 =
  8. 8.102 − 67 =
  9. 9.507 − 496 =
  10. 10.302 − 295 =
  11. 11.104 − 84 =
  12. 12.116 − 92 =
  13. 13.1015 − 981 =
  14. 14.107 − 94 =
  15. 15.89 − 62 =
  16. 16.328 − 298 =
  17. 17.528 − 481 =
  18. 18.317 − 279 =
  19. 19.1005 − 991 =
  20. 20.520 − 491 =
  21. 21.503 − 489 =
  22. 22.503 − 480 =
  23. 23.63 − 41 =
  24. 24.529 − 476 =
  25. 25.521 − 491 =
  26. 26.83 − 61 =
  27. 27.106 − 87 =
  28. 28.112 − 97 =
  29. 29.86 − 78 =
  30. 30.325 − 283 =
  31. 31.51 − 35 =
  32. 32.78 − 47 =
  33. 33.510 − 489 =
  34. 34.1001 − 987 =
  35. 35.113 − 94 =
  36. 36.306 − 287 =
  37. 37.91 − 72 =
  38. 38.113 − 97 =
  39. 39.202 − 179 =
  40. 40.96 − 75 =

Answer key

  1. 41
  2. 19
  3. 33
  4. 43
  5. 16
  6. 16
  7. 18
  8. 35
  9. 11
  10. 7
  11. 20
  12. 24
  13. 34
  14. 13
  15. 27
  16. 30
  17. 47
  18. 38
  19. 14
  20. 29
  21. 14
  22. 23
  23. 22
  24. 53
  25. 30
  26. 22
  27. 19
  28. 15
  29. 8
  30. 42
  31. 16
  32. 31
  33. 21
  34. 14
  35. 19
  36. 19
  37. 19
  38. 16
  39. 23
  40. 21

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