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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 132 · 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 41 =
  2. 2.Double 48 =
  3. 3.Half of 46 =
  4. 4.Double 47 =
  5. 5.Double 37 =
  6. 6.Double 64 =
  7. 7.Double 55 =
  8. 8.Double 78 =
  9. 9.Half of 42 =
  10. 10.Double 62 =
  11. 11.Half of 178 =
  12. 12.Double 71 =
  13. 13.Half of 156 =
  14. 14.Half of 162 =
  15. 15.Half of 146 =
  16. 16.Double 84 =
  17. 17.Half of 28 =
  18. 18.Double 22 =
  19. 19.Double 91 =
  20. 20.Half of 32 =
  21. 21.Half of 14 =
  22. 22.Double 66 =
  23. 23.Half of 58 =
  24. 24.Half of 104 =
  25. 25.Half of 82 =
  26. 26.Double 25 =
  27. 27.Half of 44 =
  28. 28.Double 18 =
  29. 29.Double 74 =
  30. 30.Half of 122 =
  31. 31.Half of 64 =
  32. 32.Half of 194 =
  33. 33.Half of 86 =
  34. 34.Double 95 =
  35. 35.Half of 22 =
  36. 36.Half of 108 =
  37. 37.Double 79 =
  38. 38.Half of 138 =
  39. 39.Half of 114 =
  40. 40.Double 16 =

Answer key

  1. 82
  2. 96
  3. 23
  4. 94
  5. 74
  6. 128
  7. 110
  8. 156
  9. 21
  10. 124
  11. 89
  12. 142
  13. 78
  14. 81
  15. 73
  16. 168
  17. 14
  18. 44
  19. 182
  20. 16
  21. 7
  22. 132
  23. 29
  24. 52
  25. 41
  26. 50
  27. 22
  28. 36
  29. 148
  30. 61
  31. 32
  32. 97
  33. 43
  34. 190
  35. 11
  36. 54
  37. 158
  38. 69
  39. 57
  40. 32

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