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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 143 · 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. 1.1025 − 988 =
  2. 2.519 − 488 =
  3. 3.305 − 285 =
  4. 4.301 − 281 =
  5. 5.312 − 276 =
  6. 6.64 − 42 =
  7. 7.102 − 67 =
  8. 8.103 − 95 =
  9. 9.107 − 93 =
  10. 10.211 − 175 =
  11. 11.71 − 25 =
  12. 12.1023 − 993 =
  13. 13.78 − 40 =
  14. 14.125 − 97 =
  15. 15.80 − 48 =
  16. 16.90 − 61 =
  17. 17.529 − 486 =
  18. 18.1010 − 980 =
  19. 19.83 − 60 =
  20. 20.1012 − 980 =
  21. 21.59 − 45 =
  22. 22.56 − 42 =
  23. 23.73 − 37 =
  24. 24.83 − 67 =
  25. 25.228 − 181 =
  26. 26.310 − 295 =
  27. 27.68 − 35 =
  28. 28.114 − 93 =
  29. 29.56 − 41 =
  30. 30.127 − 91 =
  31. 31.206 − 196 =
  32. 32.208 − 180 =
  33. 33.66 − 38 =
  34. 34.529 − 482 =
  35. 35.220 − 198 =
  36. 36.104 − 67 =
  37. 37.94 − 62 =
  38. 38.514 − 496 =
  39. 39.210 − 192 =
  40. 40.116 − 86 =

Answer key

  1. 37
  2. 31
  3. 20
  4. 20
  5. 36
  6. 22
  7. 35
  8. 8
  9. 14
  10. 36
  11. 46
  12. 30
  13. 38
  14. 28
  15. 32
  16. 29
  17. 43
  18. 30
  19. 23
  20. 32
  21. 14
  22. 14
  23. 36
  24. 16
  25. 47
  26. 15
  27. 33
  28. 21
  29. 15
  30. 36
  31. 10
  32. 28
  33. 28
  34. 47
  35. 22
  36. 37
  37. 32
  38. 18
  39. 18
  40. 30

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