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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 767 · 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.Half of 18 =
  2. 2.Double 57 =
  3. 3.Double 68 =
  4. 4.Half of 38 =
  5. 5.Half of 184 =
  6. 6.Half of 74 =
  7. 7.Double 83 =
  8. 8.Half of 36 =
  9. 9.Half of 32 =
  10. 10.Double 24 =
  11. 11.Half of 44 =
  12. 12.Half of 136 =
  13. 13.Double 89 =
  14. 14.Half of 94 =
  15. 15.Double 26 =
  16. 16.Double 84 =
  17. 17.Half of 106 =
  18. 18.Double 64 =
  19. 19.Double 91 =
  20. 20.Half of 124 =
  21. 21.Double 39 =
  22. 22.Half of 126 =
  23. 23.Double 17 =
  24. 24.Double 34 =
  25. 25.Half of 24 =
  26. 26.Double 16 =
  27. 27.Double 23 =
  28. 28.Double 72 =
  29. 29.Double 44 =
  30. 30.Double 61 =
  31. 31.Double 43 =
  32. 32.Double 27 =
  33. 33.Double 33 =
  34. 34.Half of 164 =
  35. 35.Half of 148 =
  36. 36.Half of 84 =
  37. 37.Double 94 =
  38. 38.Half of 168 =
  39. 39.Double 22 =
  40. 40.Double 29 =

Answer key

  1. 9
  2. 114
  3. 136
  4. 19
  5. 92
  6. 37
  7. 166
  8. 18
  9. 16
  10. 48
  11. 22
  12. 68
  13. 178
  14. 47
  15. 52
  16. 168
  17. 53
  18. 128
  19. 182
  20. 62
  21. 78
  22. 63
  23. 34
  24. 68
  25. 12
  26. 32
  27. 46
  28. 144
  29. 88
  30. 122
  31. 86
  32. 54
  33. 66
  34. 82
  35. 74
  36. 42
  37. 188
  38. 84
  39. 44
  40. 58

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