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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 599 · 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 26 =
  2. 2.Double 32 =
  3. 3.Half of 154 =
  4. 4.Double 38 =
  5. 5.Half of 12 =
  6. 6.Half of 142 =
  7. 7.Double 13 =
  8. 8.Half of 186 =
  9. 9.Double 82 =
  10. 10.Half of 126 =
  11. 11.Half of 82 =
  12. 12.Double 15 =
  13. 13.Double 62 =
  14. 14.Double 61 =
  15. 15.Double 26 =
  16. 16.Double 92 =
  17. 17.Half of 98 =
  18. 18.Double 74 =
  19. 19.Double 16 =
  20. 20.Double 83 =
  21. 21.Double 95 =
  22. 22.Double 59 =
  23. 23.Double 67 =
  24. 24.Double 14 =
  25. 25.Half of 92 =
  26. 26.Half of 46 =
  27. 27.Half of 74 =
  28. 28.Half of 138 =
  29. 29.Double 35 =
  30. 30.Half of 76 =
  31. 31.Double 34 =
  32. 32.Double 31 =
  33. 33.Half of 52 =
  34. 34.Double 84 =
  35. 35.Double 57 =
  36. 36.Double 22 =
  37. 37.Double 29 =
  38. 38.Double 77 =
  39. 39.Double 52 =
  40. 40.Double 44 =

Answer key

  1. 13
  2. 64
  3. 77
  4. 76
  5. 6
  6. 71
  7. 26
  8. 93
  9. 164
  10. 63
  11. 41
  12. 30
  13. 124
  14. 122
  15. 52
  16. 184
  17. 49
  18. 148
  19. 32
  20. 166
  21. 190
  22. 118
  23. 134
  24. 28
  25. 46
  26. 23
  27. 37
  28. 69
  29. 70
  30. 38
  31. 68
  32. 62
  33. 26
  34. 168
  35. 114
  36. 44
  37. 58
  38. 154
  39. 104
  40. 88

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