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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 620 · 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 57 =
  2. 2.Half of 68 =
  3. 3.Half of 62 =
  4. 4.Double 78 =
  5. 5.Half of 82 =
  6. 6.Double 31 =
  7. 7.Double 33 =
  8. 8.Double 97 =
  9. 9.Double 59 =
  10. 10.Double 64 =
  11. 11.Double 25 =
  12. 12.Double 53 =
  13. 13.Double 51 =
  14. 14.Half of 44 =
  15. 15.Half of 84 =
  16. 16.Double 22 =
  17. 17.Double 35 =
  18. 18.Half of 22 =
  19. 19.Double 52 =
  20. 20.Half of 76 =
  21. 21.Half of 78 =
  22. 22.Double 61 =
  23. 23.Half of 142 =
  24. 24.Half of 168 =
  25. 25.Double 37 =
  26. 26.Half of 118 =
  27. 27.Double 75 =
  28. 28.Half of 52 =
  29. 29.Half of 42 =
  30. 30.Double 21 =
  31. 31.Double 17 =
  32. 32.Double 42 =
  33. 33.Double 24 =
  34. 34.Double 83 =
  35. 35.Double 26 =
  36. 36.Double 39 =
  37. 37.Double 46 =
  38. 38.Double 58 =
  39. 39.Double 66 =
  40. 40.Double 28 =

Answer key

  1. 114
  2. 34
  3. 31
  4. 156
  5. 41
  6. 62
  7. 66
  8. 194
  9. 118
  10. 128
  11. 50
  12. 106
  13. 102
  14. 22
  15. 42
  16. 44
  17. 70
  18. 11
  19. 104
  20. 38
  21. 39
  22. 122
  23. 71
  24. 84
  25. 74
  26. 59
  27. 150
  28. 26
  29. 21
  30. 42
  31. 34
  32. 84
  33. 48
  34. 166
  35. 52
  36. 78
  37. 92
  38. 116
  39. 132
  40. 56

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