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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 691 · 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 21 =
  2. 2.Half of 146 =
  3. 3.Half of 52 =
  4. 4.Half of 164 =
  5. 5.Half of 38 =
  6. 6.Double 34 =
  7. 7.Half of 142 =
  8. 8.Double 46 =
  9. 9.Half of 112 =
  10. 10.Half of 94 =
  11. 11.Half of 172 =
  12. 12.Double 23 =
  13. 13.Double 77 =
  14. 14.Double 31 =
  15. 15.Half of 26 =
  16. 16.Half of 92 =
  17. 17.Half of 124 =
  18. 18.Half of 42 =
  19. 19.Double 42 =
  20. 20.Double 68 =
  21. 21.Double 22 =
  22. 22.Double 26 =
  23. 23.Double 37 =
  24. 24.Half of 182 =
  25. 25.Double 72 =
  26. 26.Half of 118 =
  27. 27.Double 75 =
  28. 28.Half of 76 =
  29. 29.Double 56 =
  30. 30.Double 15 =
  31. 31.Half of 144 =
  32. 32.Half of 16 =
  33. 33.Double 43 =
  34. 34.Half of 128 =
  35. 35.Double 66 =
  36. 36.Double 87 =
  37. 37.Half of 102 =
  38. 38.Half of 122 =
  39. 39.Double 47 =
  40. 40.Half of 168 =

Answer key

  1. 42
  2. 73
  3. 26
  4. 82
  5. 19
  6. 68
  7. 71
  8. 92
  9. 56
  10. 47
  11. 86
  12. 46
  13. 154
  14. 62
  15. 13
  16. 46
  17. 62
  18. 21
  19. 84
  20. 136
  21. 44
  22. 52
  23. 74
  24. 91
  25. 144
  26. 59
  27. 150
  28. 38
  29. 112
  30. 30
  31. 72
  32. 8
  33. 86
  34. 64
  35. 132
  36. 174
  37. 51
  38. 61
  39. 94
  40. 84

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