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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 62 · 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 54 =
  2. 2.Double 11 =
  3. 3.Double 36 =
  4. 4.Double 71 =
  5. 5.Half of 58 =
  6. 6.Half of 32 =
  7. 7.Half of 92 =
  8. 8.Double 22 =
  9. 9.Double 43 =
  10. 10.Half of 52 =
  11. 11.Half of 34 =
  12. 12.Double 89 =
  13. 13.Double 58 =
  14. 14.Double 87 =
  15. 15.Double 42 =
  16. 16.Half of 48 =
  17. 17.Half of 132 =
  18. 18.Double 61 =
  19. 19.Double 32 =
  20. 20.Double 78 =
  21. 21.Double 41 =
  22. 22.Double 28 =
  23. 23.Double 12 =
  24. 24.Double 64 =
  25. 25.Double 44 =
  26. 26.Double 13 =
  27. 27.Double 95 =
  28. 28.Double 34 =
  29. 29.Double 92 =
  30. 30.Half of 96 =
  31. 31.Half of 22 =
  32. 32.Double 31 =
  33. 33.Half of 106 =
  34. 34.Double 67 =
  35. 35.Double 51 =
  36. 36.Double 27 =
  37. 37.Double 82 =
  38. 38.Half of 42 =
  39. 39.Half of 116 =
  40. 40.Double 18 =

Answer key

  1. 108
  2. 22
  3. 72
  4. 142
  5. 29
  6. 16
  7. 46
  8. 44
  9. 86
  10. 26
  11. 17
  12. 178
  13. 116
  14. 174
  15. 84
  16. 24
  17. 66
  18. 122
  19. 64
  20. 156
  21. 82
  22. 56
  23. 24
  24. 128
  25. 88
  26. 26
  27. 190
  28. 68
  29. 184
  30. 48
  31. 11
  32. 62
  33. 53
  34. 134
  35. 102
  36. 54
  37. 164
  38. 21
  39. 58
  40. 36

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