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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 109 · 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 14 =
  2. 2.Half of 162 =
  3. 3.Half of 96 =
  4. 4.Half of 48 =
  5. 5.Half of 106 =
  6. 6.Half of 88 =
  7. 7.Double 85 =
  8. 8.Double 65 =
  9. 9.Half of 136 =
  10. 10.Double 16 =
  11. 11.Double 11 =
  12. 12.Double 61 =
  13. 13.Double 88 =
  14. 14.Half of 112 =
  15. 15.Double 54 =
  16. 16.Half of 12 =
  17. 17.Double 59 =
  18. 18.Half of 174 =
  19. 19.Half of 172 =
  20. 20.Double 63 =
  21. 21.Double 34 =
  22. 22.Half of 22 =
  23. 23.Half of 58 =
  24. 24.Half of 142 =
  25. 25.Half of 56 =
  26. 26.Double 47 =
  27. 27.Double 25 =
  28. 28.Double 91 =
  29. 29.Double 24 =
  30. 30.Double 21 =
  31. 31.Double 83 =
  32. 32.Half of 66 =
  33. 33.Double 19 =
  34. 34.Double 36 =
  35. 35.Half of 72 =
  36. 36.Double 78 =
  37. 37.Double 73 =
  38. 38.Double 26 =
  39. 39.Half of 26 =
  40. 40.Half of 42 =

Answer key

  1. 7
  2. 81
  3. 48
  4. 24
  5. 53
  6. 44
  7. 170
  8. 130
  9. 68
  10. 32
  11. 22
  12. 122
  13. 176
  14. 56
  15. 108
  16. 6
  17. 118
  18. 87
  19. 86
  20. 126
  21. 68
  22. 11
  23. 29
  24. 71
  25. 28
  26. 94
  27. 50
  28. 182
  29. 48
  30. 42
  31. 166
  32. 33
  33. 38
  34. 72
  35. 36
  36. 156
  37. 146
  38. 52
  39. 13
  40. 21

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