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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 105 · 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 16 =
  2. 2.Half of 184 =
  3. 3.Double 47 =
  4. 4.Half of 42 =
  5. 5.Double 13 =
  6. 6.Half of 32 =
  7. 7.Half of 134 =
  8. 8.Half of 182 =
  9. 9.Double 97 =
  10. 10.Half of 46 =
  11. 11.Double 94 =
  12. 12.Double 86 =
  13. 13.Double 57 =
  14. 14.Half of 52 =
  15. 15.Double 31 =
  16. 16.Double 84 =
  17. 17.Double 65 =
  18. 18.Half of 106 =
  19. 19.Half of 54 =
  20. 20.Half of 44 =
  21. 21.Double 42 =
  22. 22.Double 21 =
  23. 23.Half of 112 =
  24. 24.Double 12 =
  25. 25.Half of 62 =
  26. 26.Half of 78 =
  27. 27.Double 27 =
  28. 28.Half of 28 =
  29. 29.Double 38 =
  30. 30.Half of 128 =
  31. 31.Double 91 =
  32. 32.Double 44 =
  33. 33.Half of 12 =
  34. 34.Double 22 =
  35. 35.Double 74 =
  36. 36.Double 83 =
  37. 37.Half of 56 =
  38. 38.Double 11 =
  39. 39.Double 71 =
  40. 40.Half of 94 =

Answer key

  1. 8
  2. 92
  3. 94
  4. 21
  5. 26
  6. 16
  7. 67
  8. 91
  9. 194
  10. 23
  11. 188
  12. 172
  13. 114
  14. 26
  15. 62
  16. 168
  17. 130
  18. 53
  19. 27
  20. 22
  21. 84
  22. 42
  23. 56
  24. 24
  25. 31
  26. 39
  27. 54
  28. 14
  29. 76
  30. 64
  31. 182
  32. 88
  33. 6
  34. 44
  35. 148
  36. 166
  37. 28
  38. 22
  39. 142
  40. 47

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