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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 368 · 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 54 =
  2. 2.Double 28 =
  3. 3.Half of 112 =
  4. 4.Half of 136 =
  5. 5.Half of 148 =
  6. 6.Double 35 =
  7. 7.Double 51 =
  8. 8.Double 68 =
  9. 9.Double 93 =
  10. 10.Double 59 =
  11. 11.Double 33 =
  12. 12.Double 77 =
  13. 13.Half of 82 =
  14. 14.Double 98 =
  15. 15.Double 14 =
  16. 16.Double 56 =
  17. 17.Double 32 =
  18. 18.Half of 72 =
  19. 19.Double 63 =
  20. 20.Double 92 =
  21. 21.Half of 114 =
  22. 22.Half of 164 =
  23. 23.Half of 92 =
  24. 24.Double 67 =
  25. 25.Double 36 =
  26. 26.Double 61 =
  27. 27.Half of 14 =
  28. 28.Double 22 =
  29. 29.Half of 46 =
  30. 30.Double 82 =
  31. 31.Half of 12 =
  32. 32.Double 72 =
  33. 33.Half of 132 =
  34. 34.Half of 122 =
  35. 35.Double 34 =
  36. 36.Half of 32 =
  37. 37.Half of 98 =
  38. 38.Half of 22 =
  39. 39.Double 12 =
  40. 40.Double 47 =

Answer key

  1. 108
  2. 56
  3. 56
  4. 68
  5. 74
  6. 70
  7. 102
  8. 136
  9. 186
  10. 118
  11. 66
  12. 154
  13. 41
  14. 196
  15. 28
  16. 112
  17. 64
  18. 36
  19. 126
  20. 184
  21. 57
  22. 82
  23. 46
  24. 134
  25. 72
  26. 122
  27. 7
  28. 44
  29. 23
  30. 164
  31. 6
  32. 144
  33. 66
  34. 61
  35. 68
  36. 16
  37. 49
  38. 11
  39. 24
  40. 94

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