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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 127 · 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 39 =
  2. 2.Half of 144 =
  3. 3.Half of 32 =
  4. 4.Double 88 =
  5. 5.Half of 46 =
  6. 6.Double 81 =
  7. 7.Half of 132 =
  8. 8.Half of 26 =
  9. 9.Half of 92 =
  10. 10.Half of 28 =
  11. 11.Half of 156 =
  12. 12.Half of 142 =
  13. 13.Double 87 =
  14. 14.Double 34 =
  15. 15.Double 42 =
  16. 16.Double 55 =
  17. 17.Half of 126 =
  18. 18.Half of 14 =
  19. 19.Half of 152 =
  20. 20.Half of 182 =
  21. 21.Double 44 =
  22. 22.Half of 188 =
  23. 23.Half of 94 =
  24. 24.Double 64 =
  25. 25.Half of 162 =
  26. 26.Double 18 =
  27. 27.Half of 198 =
  28. 28.Half of 82 =
  29. 29.Double 67 =
  30. 30.Half of 112 =
  31. 31.Double 53 =
  32. 32.Half of 136 =
  33. 33.Half of 48 =
  34. 34.Half of 118 =
  35. 35.Double 48 =
  36. 36.Half of 168 =
  37. 37.Double 75 =
  38. 38.Half of 76 =
  39. 39.Double 62 =
  40. 40.Half of 166 =

Answer key

  1. 78
  2. 72
  3. 16
  4. 176
  5. 23
  6. 162
  7. 66
  8. 13
  9. 46
  10. 14
  11. 78
  12. 71
  13. 174
  14. 68
  15. 84
  16. 110
  17. 63
  18. 7
  19. 76
  20. 91
  21. 88
  22. 94
  23. 47
  24. 128
  25. 81
  26. 36
  27. 99
  28. 41
  29. 134
  30. 56
  31. 106
  32. 68
  33. 24
  34. 59
  35. 96
  36. 84
  37. 150
  38. 38
  39. 124
  40. 83

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