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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 499 · 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 84 =
  2. 2.Half of 142 =
  3. 3.Half of 62 =
  4. 4.Double 67 =
  5. 5.Half of 86 =
  6. 6.Double 24 =
  7. 7.Half of 158 =
  8. 8.Double 83 =
  9. 9.Half of 118 =
  10. 10.Half of 184 =
  11. 11.Double 49 =
  12. 12.Double 79 =
  13. 13.Double 15 =
  14. 14.Half of 112 =
  15. 15.Double 16 =
  16. 16.Double 46 =
  17. 17.Double 48 =
  18. 18.Double 45 =
  19. 19.Double 89 =
  20. 20.Double 85 =
  21. 21.Double 54 =
  22. 22.Double 17 =
  23. 23.Half of 162 =
  24. 24.Double 77 =
  25. 25.Half of 34 =
  26. 26.Double 35 =
  27. 27.Double 32 =
  28. 28.Half of 174 =
  29. 29.Double 61 =
  30. 30.Half of 78 =
  31. 31.Double 92 =
  32. 32.Half of 132 =
  33. 33.Half of 32 =
  34. 34.Double 99 =
  35. 35.Half of 96 =
  36. 36.Double 84 =
  37. 37.Double 34 =
  38. 38.Half of 124 =
  39. 39.Double 74 =
  40. 40.Double 31 =

Answer key

  1. 42
  2. 71
  3. 31
  4. 134
  5. 43
  6. 48
  7. 79
  8. 166
  9. 59
  10. 92
  11. 98
  12. 158
  13. 30
  14. 56
  15. 32
  16. 92
  17. 96
  18. 90
  19. 178
  20. 170
  21. 108
  22. 34
  23. 81
  24. 154
  25. 17
  26. 70
  27. 64
  28. 87
  29. 122
  30. 39
  31. 184
  32. 66
  33. 16
  34. 198
  35. 48
  36. 168
  37. 68
  38. 62
  39. 148
  40. 62

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