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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 129 · 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 172 =
  2. 2.Double 91 =
  3. 3.Half of 102 =
  4. 4.Double 53 =
  5. 5.Double 59 =
  6. 6.Double 58 =
  7. 7.Double 34 =
  8. 8.Half of 122 =
  9. 9.Half of 48 =
  10. 10.Half of 126 =
  11. 11.Double 13 =
  12. 12.Double 63 =
  13. 13.Half of 156 =
  14. 14.Half of 62 =
  15. 15.Half of 116 =
  16. 16.Half of 108 =
  17. 17.Double 85 =
  18. 18.Half of 66 =
  19. 19.Double 21 =
  20. 20.Double 43 =
  21. 21.Half of 76 =
  22. 22.Half of 72 =
  23. 23.Double 87 =
  24. 24.Half of 22 =
  25. 25.Double 83 =
  26. 26.Double 28 =
  27. 27.Half of 84 =
  28. 28.Half of 162 =
  29. 29.Half of 106 =
  30. 30.Half of 114 =
  31. 31.Half of 28 =
  32. 32.Double 89 =
  33. 33.Double 61 =
  34. 34.Half of 132 =
  35. 35.Half of 158 =
  36. 36.Half of 164 =
  37. 37.Double 77 =
  38. 38.Double 65 =
  39. 39.Double 82 =
  40. 40.Double 26 =

Answer key

  1. 86
  2. 182
  3. 51
  4. 106
  5. 118
  6. 116
  7. 68
  8. 61
  9. 24
  10. 63
  11. 26
  12. 126
  13. 78
  14. 31
  15. 58
  16. 54
  17. 170
  18. 33
  19. 42
  20. 86
  21. 38
  22. 36
  23. 174
  24. 11
  25. 166
  26. 56
  27. 42
  28. 81
  29. 53
  30. 57
  31. 14
  32. 178
  33. 122
  34. 66
  35. 79
  36. 82
  37. 154
  38. 130
  39. 164
  40. 52

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