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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 39 · 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 81 =
  2. 2.Half of 34 =
  3. 3.Double 47 =
  4. 4.Double 92 =
  5. 5.Half of 172 =
  6. 6.Double 84 =
  7. 7.Double 57 =
  8. 8.Double 52 =
  9. 9.Double 42 =
  10. 10.Half of 84 =
  11. 11.Half of 16 =
  12. 12.Double 74 =
  13. 13.Double 94 =
  14. 14.Double 12 =
  15. 15.Half of 154 =
  16. 16.Half of 152 =
  17. 17.Half of 102 =
  18. 18.Double 64 =
  19. 19.Half of 144 =
  20. 20.Double 76 =
  21. 21.Half of 72 =
  22. 22.Double 11 =
  23. 23.Half of 126 =
  24. 24.Half of 198 =
  25. 25.Double 55 =
  26. 26.Double 72 =
  27. 27.Double 61 =
  28. 28.Half of 14 =
  29. 29.Half of 116 =
  30. 30.Half of 166 =
  31. 31.Double 82 =
  32. 32.Double 31 =
  33. 33.Half of 48 =
  34. 34.Half of 52 =
  35. 35.Half of 186 =
  36. 36.Half of 182 =
  37. 37.Double 32 =
  38. 38.Double 51 =
  39. 39.Half of 54 =
  40. 40.Double 91 =

Answer key

  1. 162
  2. 17
  3. 94
  4. 184
  5. 86
  6. 168
  7. 114
  8. 104
  9. 84
  10. 42
  11. 8
  12. 148
  13. 188
  14. 24
  15. 77
  16. 76
  17. 51
  18. 128
  19. 72
  20. 152
  21. 36
  22. 22
  23. 63
  24. 99
  25. 110
  26. 144
  27. 122
  28. 7
  29. 58
  30. 83
  31. 164
  32. 62
  33. 24
  34. 26
  35. 93
  36. 91
  37. 64
  38. 102
  39. 27
  40. 182

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