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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 24 · 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.Double 57 =
  3. 3.Half of 172 =
  4. 4.Double 86 =
  5. 5.Double 55 =
  6. 6.Double 71 =
  7. 7.Half of 52 =
  8. 8.Half of 14 =
  9. 9.Half of 122 =
  10. 10.Half of 164 =
  11. 11.Half of 152 =
  12. 12.Double 98 =
  13. 13.Double 35 =
  14. 14.Half of 18 =
  15. 15.Double 56 =
  16. 16.Half of 176 =
  17. 17.Double 68 =
  18. 18.Half of 112 =
  19. 19.Double 33 =
  20. 20.Double 51 =
  21. 21.Half of 156 =
  22. 22.Half of 116 =
  23. 23.Half of 32 =
  24. 24.Double 75 =
  25. 25.Double 32 =
  26. 26.Double 41 =
  27. 27.Double 26 =
  28. 28.Half of 42 =
  29. 29.Double 15 =
  30. 30.Half of 28 =
  31. 31.Double 22 =
  32. 32.Double 61 =
  33. 33.Double 58 =
  34. 34.Double 81 =
  35. 35.Half of 72 =
  36. 36.Double 18 =
  37. 37.Half of 128 =
  38. 38.Double 49 =
  39. 39.Double 84 =
  40. 40.Double 11 =

Answer key

  1. 28
  2. 114
  3. 86
  4. 172
  5. 110
  6. 142
  7. 26
  8. 7
  9. 61
  10. 82
  11. 76
  12. 196
  13. 70
  14. 9
  15. 112
  16. 88
  17. 136
  18. 56
  19. 66
  20. 102
  21. 78
  22. 58
  23. 16
  24. 150
  25. 64
  26. 82
  27. 52
  28. 21
  29. 30
  30. 14
  31. 44
  32. 122
  33. 116
  34. 162
  35. 36
  36. 36
  37. 64
  38. 98
  39. 168
  40. 22

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