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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 523 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Double 56 =
  2. 2.Double 88 =
  3. 3.Double 97 =
  4. 4.Half of 82 =
  5. 5.Double 52 =
  6. 6.Double 77 =
  7. 7.Double 35 =
  8. 8.Double 11 =
  9. 9.Double 25 =
  10. 10.Double 23 =
  11. 11.Double 18 =
  12. 12.Double 61 =
  13. 13.Double 69 =
  14. 14.Double 31 =
  15. 15.Double 84 =
  16. 16.Double 26 =
  17. 17.Half of 128 =
  18. 18.Half of 14 =
  19. 19.Double 72 =
  20. 20.Double 42 =
  21. 21.Double 75 =
  22. 22.Half of 158 =
  23. 23.Double 33 =
  24. 24.Half of 96 =
  25. 25.Double 48 =
  26. 26.Double 76 =
  27. 27.Double 74 =
  28. 28.Double 32 =
  29. 29.Half of 124 =
  30. 30.Double 79 =
  31. 31.Double 41 =
  32. 32.Double 29 =
  33. 33.Half of 172 =
  34. 34.Double 49 =
  35. 35.Half of 52 =
  36. 36.Double 82 =
  37. 37.Half of 98 =
  38. 38.Double 81 =
  39. 39.Half of 78 =
  40. 40.Half of 76 =

Answer key

  1. 112
  2. 176
  3. 194
  4. 41
  5. 104
  6. 154
  7. 70
  8. 22
  9. 50
  10. 46
  11. 36
  12. 122
  13. 138
  14. 62
  15. 168
  16. 52
  17. 64
  18. 7
  19. 144
  20. 84
  21. 150
  22. 79
  23. 66
  24. 48
  25. 96
  26. 152
  27. 148
  28. 64
  29. 62
  30. 158
  31. 82
  32. 58
  33. 86
  34. 98
  35. 26
  36. 164
  37. 49
  38. 162
  39. 39
  40. 38

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