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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 435 · 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 34 =
  2. 2.Double 31 =
  3. 3.Double 33 =
  4. 4.Half of 48 =
  5. 5.Double 96 =
  6. 6.Half of 136 =
  7. 7.Double 52 =
  8. 8.Half of 78 =
  9. 9.Double 51 =
  10. 10.Double 55 =
  11. 11.Half of 194 =
  12. 12.Double 56 =
  13. 13.Double 45 =
  14. 14.Half of 138 =
  15. 15.Double 64 =
  16. 16.Double 54 =
  17. 17.Double 72 =
  18. 18.Double 43 =
  19. 19.Half of 118 =
  20. 20.Half of 42 =
  21. 21.Half of 54 =
  22. 22.Double 91 =
  23. 23.Double 36 =
  24. 24.Double 26 =
  25. 25.Double 48 =
  26. 26.Double 71 =
  27. 27.Double 24 =
  28. 28.Double 85 =
  29. 29.Double 13 =
  30. 30.Half of 126 =
  31. 31.Half of 156 =
  32. 32.Half of 134 =
  33. 33.Double 29 =
  34. 34.Half of 32 =
  35. 35.Half of 64 =
  36. 36.Double 19 =
  37. 37.Double 37 =
  38. 38.Double 62 =
  39. 39.Half of 116 =
  40. 40.Half of 18 =

Answer key

  1. 68
  2. 62
  3. 66
  4. 24
  5. 192
  6. 68
  7. 104
  8. 39
  9. 102
  10. 110
  11. 97
  12. 112
  13. 90
  14. 69
  15. 128
  16. 108
  17. 144
  18. 86
  19. 59
  20. 21
  21. 27
  22. 182
  23. 72
  24. 52
  25. 96
  26. 142
  27. 48
  28. 170
  29. 26
  30. 63
  31. 78
  32. 67
  33. 58
  34. 16
  35. 32
  36. 38
  37. 74
  38. 124
  39. 58
  40. 9

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