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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 372 · 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 64 =
  2. 2.Double 81 =
  3. 3.Double 41 =
  4. 4.Double 52 =
  5. 5.Double 78 =
  6. 6.Double 45 =
  7. 7.Half of 98 =
  8. 8.Half of 142 =
  9. 9.Double 91 =
  10. 10.Half of 22 =
  11. 11.Half of 172 =
  12. 12.Double 47 =
  13. 13.Double 71 =
  14. 14.Half of 96 =
  15. 15.Half of 52 =
  16. 16.Half of 48 =
  17. 17.Double 56 =
  18. 18.Double 74 =
  19. 19.Double 69 =
  20. 20.Double 38 =
  21. 21.Double 83 =
  22. 22.Double 73 =
  23. 23.Double 31 =
  24. 24.Double 64 =
  25. 25.Half of 184 =
  26. 26.Half of 108 =
  27. 27.Double 63 =
  28. 28.Double 11 =
  29. 29.Half of 116 =
  30. 30.Half of 132 =
  31. 31.Double 49 =
  32. 32.Half of 118 =
  33. 33.Double 66 =
  34. 34.Double 44 =
  35. 35.Double 24 =
  36. 36.Half of 102 =
  37. 37.Double 72 =
  38. 38.Double 55 =
  39. 39.Double 99 =
  40. 40.Double 58 =

Answer key

  1. 32
  2. 162
  3. 82
  4. 104
  5. 156
  6. 90
  7. 49
  8. 71
  9. 182
  10. 11
  11. 86
  12. 94
  13. 142
  14. 48
  15. 26
  16. 24
  17. 112
  18. 148
  19. 138
  20. 76
  21. 166
  22. 146
  23. 62
  24. 128
  25. 92
  26. 54
  27. 126
  28. 22
  29. 58
  30. 66
  31. 98
  32. 59
  33. 132
  34. 88
  35. 48
  36. 51
  37. 144
  38. 110
  39. 198
  40. 116

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