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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 629 · 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 15 =
  2. 2.Double 31 =
  3. 3.Half of 116 =
  4. 4.Half of 32 =
  5. 5.Half of 188 =
  6. 6.Half of 138 =
  7. 7.Half of 84 =
  8. 8.Double 42 =
  9. 9.Half of 12 =
  10. 10.Half of 196 =
  11. 11.Half of 118 =
  12. 12.Double 95 =
  13. 13.Double 45 =
  14. 14.Double 21 =
  15. 15.Half of 108 =
  16. 16.Double 93 =
  17. 17.Half of 194 =
  18. 18.Double 61 =
  19. 19.Double 92 =
  20. 20.Double 39 =
  21. 21.Double 13 =
  22. 22.Half of 52 =
  23. 23.Double 11 =
  24. 24.Double 28 =
  25. 25.Half of 22 =
  26. 26.Double 75 =
  27. 27.Double 63 =
  28. 28.Double 38 =
  29. 29.Double 71 =
  30. 30.Half of 132 =
  31. 31.Double 29 =
  32. 32.Double 68 =
  33. 33.Half of 172 =
  34. 34.Double 54 =
  35. 35.Half of 86 =
  36. 36.Half of 76 =
  37. 37.Double 26 =
  38. 38.Double 47 =
  39. 39.Double 33 =
  40. 40.Double 78 =

Answer key

  1. 30
  2. 62
  3. 58
  4. 16
  5. 94
  6. 69
  7. 42
  8. 84
  9. 6
  10. 98
  11. 59
  12. 190
  13. 90
  14. 42
  15. 54
  16. 186
  17. 97
  18. 122
  19. 184
  20. 78
  21. 26
  22. 26
  23. 22
  24. 56
  25. 11
  26. 150
  27. 126
  28. 76
  29. 142
  30. 66
  31. 58
  32. 136
  33. 86
  34. 108
  35. 43
  36. 38
  37. 52
  38. 94
  39. 66
  40. 156

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