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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 37 · 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 14 =
  2. 2.Half of 112 =
  3. 3.Double 93 =
  4. 4.Half of 14 =
  5. 5.Double 33 =
  6. 6.Half of 78 =
  7. 7.Double 92 =
  8. 8.Double 89 =
  9. 9.Double 58 =
  10. 10.Double 22 =
  11. 11.Double 68 =
  12. 12.Half of 82 =
  13. 13.Double 44 =
  14. 14.Double 47 =
  15. 15.Double 66 =
  16. 16.Half of 182 =
  17. 17.Half of 36 =
  18. 18.Double 42 =
  19. 19.Half of 102 =
  20. 20.Half of 22 =
  21. 21.Double 51 =
  22. 22.Double 85 =
  23. 23.Double 73 =
  24. 24.Half of 128 =
  25. 25.Half of 158 =
  26. 26.Double 26 =
  27. 27.Half of 118 =
  28. 28.Double 99 =
  29. 29.Double 32 =
  30. 30.Double 91 =
  31. 31.Half of 96 =
  32. 32.Double 61 =
  33. 33.Half of 46 =
  34. 34.Double 38 =
  35. 35.Half of 144 =
  36. 36.Double 74 =
  37. 37.Double 48 =
  38. 38.Double 16 =
  39. 39.Half of 116 =
  40. 40.Double 82 =

Answer key

  1. 28
  2. 56
  3. 186
  4. 7
  5. 66
  6. 39
  7. 184
  8. 178
  9. 116
  10. 44
  11. 136
  12. 41
  13. 88
  14. 94
  15. 132
  16. 91
  17. 18
  18. 84
  19. 51
  20. 11
  21. 102
  22. 170
  23. 146
  24. 64
  25. 79
  26. 52
  27. 59
  28. 198
  29. 64
  30. 182
  31. 48
  32. 122
  33. 23
  34. 76
  35. 72
  36. 148
  37. 96
  38. 32
  39. 58
  40. 164

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