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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 438 · 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. 1.130 − 80 =
  2. 2.53 − 44 =
  3. 3.124 − 94 =
  4. 4.1012 − 980 =
  5. 5.118 − 81 =
  6. 6.210 − 198 =
  7. 7.505 − 476 =
  8. 8.100 − 67 =
  9. 9.322 − 280 =
  10. 10.55 − 39 =
  11. 11.509 − 493 =
  12. 12.309 − 288 =
  13. 13.205 − 198 =
  14. 14.208 − 176 =
  15. 15.62 − 28 =
  16. 16.301 − 278 =
  17. 17.123 − 92 =
  18. 18.322 − 283 =
  19. 19.99 − 61 =
  20. 20.56 − 43 =
  21. 21.521 − 475 =
  22. 22.86 − 67 =
  23. 23.80 − 26 =
  24. 24.326 − 284 =
  25. 25.324 − 275 =
  26. 26.206 − 184 =
  27. 27.1020 − 989 =
  28. 28.1025 − 995 =
  29. 29.107 − 65 =
  30. 30.1025 − 986 =
  31. 31.1008 − 981 =
  32. 32.85 − 60 =
  33. 33.52 − 30 =
  34. 34.88 − 60 =
  35. 35.304 − 282 =
  36. 36.126 − 87 =
  37. 37.522 − 478 =
  38. 38.56 − 47 =
  39. 39.92 − 78 =
  40. 40.529 − 488 =

Answer key

  1. 50
  2. 9
  3. 30
  4. 32
  5. 37
  6. 12
  7. 29
  8. 33
  9. 42
  10. 16
  11. 16
  12. 21
  13. 7
  14. 32
  15. 34
  16. 23
  17. 31
  18. 39
  19. 38
  20. 13
  21. 46
  22. 19
  23. 54
  24. 42
  25. 49
  26. 22
  27. 31
  28. 30
  29. 42
  30. 39
  31. 27
  32. 25
  33. 22
  34. 28
  35. 22
  36. 39
  37. 44
  38. 9
  39. 14
  40. 41

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