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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 648 · 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 94 =
  2. 2.Double 43 =
  3. 3.Double 21 =
  4. 4.Half of 54 =
  5. 5.Double 56 =
  6. 6.Double 12 =
  7. 7.Half of 132 =
  8. 8.Half of 82 =
  9. 9.Double 46 =
  10. 10.Half of 24 =
  11. 11.Half of 182 =
  12. 12.Double 41 =
  13. 13.Double 96 =
  14. 14.Half of 122 =
  15. 15.Double 26 =
  16. 16.Half of 102 =
  17. 17.Double 35 =
  18. 18.Double 31 =
  19. 19.Double 93 =
  20. 20.Half of 52 =
  21. 21.Half of 86 =
  22. 22.Half of 106 =
  23. 23.Double 72 =
  24. 24.Half of 104 =
  25. 25.Double 55 =
  26. 26.Double 23 =
  27. 27.Half of 42 =
  28. 28.Half of 58 =
  29. 29.Double 89 =
  30. 30.Double 22 =
  31. 31.Double 74 =
  32. 32.Double 76 =
  33. 33.Half of 32 =
  34. 34.Half of 154 =
  35. 35.Double 85 =
  36. 36.Double 78 =
  37. 37.Half of 92 =
  38. 38.Double 88 =
  39. 39.Half of 108 =
  40. 40.Double 53 =

Answer key

  1. 47
  2. 86
  3. 42
  4. 27
  5. 112
  6. 24
  7. 66
  8. 41
  9. 92
  10. 12
  11. 91
  12. 82
  13. 192
  14. 61
  15. 52
  16. 51
  17. 70
  18. 62
  19. 186
  20. 26
  21. 43
  22. 53
  23. 144
  24. 52
  25. 110
  26. 46
  27. 21
  28. 29
  29. 178
  30. 44
  31. 148
  32. 152
  33. 16
  34. 77
  35. 170
  36. 156
  37. 46
  38. 176
  39. 54
  40. 106

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