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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 646 · 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 51 =
  2. 2.Double 43 =
  3. 3.Half of 32 =
  4. 4.Half of 92 =
  5. 5.Double 38 =
  6. 6.Double 19 =
  7. 7.Half of 84 =
  8. 8.Double 61 =
  9. 9.Double 64 =
  10. 10.Half of 176 =
  11. 11.Double 72 =
  12. 12.Half of 82 =
  13. 13.Half of 184 =
  14. 14.Half of 12 =
  15. 15.Half of 102 =
  16. 16.Half of 58 =
  17. 17.Double 57 =
  18. 18.Half of 158 =
  19. 19.Double 49 =
  20. 20.Double 16 =
  21. 21.Half of 66 =
  22. 22.Double 75 =
  23. 23.Double 47 =
  24. 24.Half of 154 =
  25. 25.Half of 86 =
  26. 26.Half of 138 =
  27. 27.Half of 48 =
  28. 28.Double 99 =
  29. 29.Half of 178 =
  30. 30.Double 69 =
  31. 31.Half of 194 =
  32. 32.Half of 54 =
  33. 33.Half of 128 =
  34. 34.Double 76 =
  35. 35.Half of 118 =
  36. 36.Double 27 =
  37. 37.Half of 116 =
  38. 38.Double 48 =
  39. 39.Half of 112 =
  40. 40.Half of 162 =

Answer key

  1. 102
  2. 86
  3. 16
  4. 46
  5. 76
  6. 38
  7. 42
  8. 122
  9. 128
  10. 88
  11. 144
  12. 41
  13. 92
  14. 6
  15. 51
  16. 29
  17. 114
  18. 79
  19. 98
  20. 32
  21. 33
  22. 150
  23. 94
  24. 77
  25. 43
  26. 69
  27. 24
  28. 198
  29. 89
  30. 138
  31. 97
  32. 27
  33. 64
  34. 152
  35. 59
  36. 54
  37. 58
  38. 96
  39. 56
  40. 81

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