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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 31 · 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 25 =
  3. 3.Half of 62 =
  4. 4.Half of 12 =
  5. 5.Double 67 =
  6. 6.Double 77 =
  7. 7.Double 24 =
  8. 8.Double 86 =
  9. 9.Half of 194 =
  10. 10.Double 71 =
  11. 11.Double 91 =
  12. 12.Half of 112 =
  13. 13.Double 75 =
  14. 14.Double 68 =
  15. 15.Half of 102 =
  16. 16.Double 53 =
  17. 17.Half of 32 =
  18. 18.Half of 44 =
  19. 19.Double 19 =
  20. 20.Half of 72 =
  21. 21.Double 48 =
  22. 22.Double 17 =
  23. 23.Double 49 =
  24. 24.Half of 166 =
  25. 25.Half of 138 =
  26. 26.Double 21 =
  27. 27.Half of 48 =
  28. 28.Half of 94 =
  29. 29.Half of 28 =
  30. 30.Half of 132 =
  31. 31.Double 38 =
  32. 32.Double 43 =
  33. 33.Double 31 =
  34. 34.Double 29 =
  35. 35.Half of 156 =
  36. 36.Double 45 =
  37. 37.Double 78 =
  38. 38.Double 47 =
  39. 39.Half of 98 =
  40. 40.Half of 92 =

Answer key

  1. 82
  2. 50
  3. 31
  4. 6
  5. 134
  6. 154
  7. 48
  8. 172
  9. 97
  10. 142
  11. 182
  12. 56
  13. 150
  14. 136
  15. 51
  16. 106
  17. 16
  18. 22
  19. 38
  20. 36
  21. 96
  22. 34
  23. 98
  24. 83
  25. 69
  26. 42
  27. 24
  28. 47
  29. 14
  30. 66
  31. 76
  32. 86
  33. 62
  34. 58
  35. 78
  36. 90
  37. 156
  38. 94
  39. 49
  40. 46

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