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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 179 · 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 37 =
  2. 2.Half of 94 =
  3. 3.Half of 24 =
  4. 4.Half of 118 =
  5. 5.Double 27 =
  6. 6.Double 71 =
  7. 7.Half of 174 =
  8. 8.Half of 82 =
  9. 9.Half of 158 =
  10. 10.Half of 64 =
  11. 11.Half of 32 =
  12. 12.Half of 16 =
  13. 13.Double 63 =
  14. 14.Double 22 =
  15. 15.Half of 26 =
  16. 16.Double 34 =
  17. 17.Double 28 =
  18. 18.Half of 18 =
  19. 19.Double 59 =
  20. 20.Double 25 =
  21. 21.Half of 126 =
  22. 22.Double 42 =
  23. 23.Half of 196 =
  24. 24.Double 77 =
  25. 25.Double 21 =
  26. 26.Half of 136 =
  27. 27.Double 93 =
  28. 28.Double 66 =
  29. 29.Double 36 =
  30. 30.Double 91 =
  31. 31.Half of 162 =
  32. 32.Double 32 =
  33. 33.Half of 54 =
  34. 34.Half of 138 =
  35. 35.Half of 154 =
  36. 36.Half of 48 =
  37. 37.Double 85 =
  38. 38.Half of 106 =
  39. 39.Half of 36 =
  40. 40.Double 26 =

Answer key

  1. 74
  2. 47
  3. 12
  4. 59
  5. 54
  6. 142
  7. 87
  8. 41
  9. 79
  10. 32
  11. 16
  12. 8
  13. 126
  14. 44
  15. 13
  16. 68
  17. 56
  18. 9
  19. 118
  20. 50
  21. 63
  22. 84
  23. 98
  24. 154
  25. 42
  26. 68
  27. 186
  28. 132
  29. 72
  30. 182
  31. 81
  32. 64
  33. 27
  34. 69
  35. 77
  36. 24
  37. 170
  38. 53
  39. 18
  40. 52

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