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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 147 · 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 52 =
  2. 2.Half of 46 =
  3. 3.Half of 172 =
  4. 4.Half of 24 =
  5. 5.Double 26 =
  6. 6.Double 18 =
  7. 7.Half of 84 =
  8. 8.Double 49 =
  9. 9.Double 19 =
  10. 10.Half of 162 =
  11. 11.Half of 32 =
  12. 12.Double 72 =
  13. 13.Double 78 =
  14. 14.Half of 112 =
  15. 15.Double 57 =
  16. 16.Double 35 =
  17. 17.Double 98 =
  18. 18.Double 54 =
  19. 19.Half of 106 =
  20. 20.Half of 136 =
  21. 21.Double 11 =
  22. 22.Half of 16 =
  23. 23.Half of 132 =
  24. 24.Double 94 =
  25. 25.Double 41 =
  26. 26.Double 91 =
  27. 27.Double 56 =
  28. 28.Double 38 =
  29. 29.Double 77 =
  30. 30.Double 47 =
  31. 31.Half of 74 =
  32. 32.Half of 124 =
  33. 33.Half of 54 =
  34. 34.Double 15 =
  35. 35.Double 34 =
  36. 36.Double 16 =
  37. 37.Half of 104 =
  38. 38.Double 51 =
  39. 39.Double 25 =
  40. 40.Double 37 =

Answer key

  1. 104
  2. 23
  3. 86
  4. 12
  5. 52
  6. 36
  7. 42
  8. 98
  9. 38
  10. 81
  11. 16
  12. 144
  13. 156
  14. 56
  15. 114
  16. 70
  17. 196
  18. 108
  19. 53
  20. 68
  21. 22
  22. 8
  23. 66
  24. 188
  25. 82
  26. 182
  27. 112
  28. 76
  29. 154
  30. 94
  31. 37
  32. 62
  33. 27
  34. 30
  35. 68
  36. 32
  37. 52
  38. 102
  39. 50
  40. 74

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