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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 352 · 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.Half of 84 =
  2. 2.Half of 48 =
  3. 3.Half of 142 =
  4. 4.Half of 174 =
  5. 5.Half of 46 =
  6. 6.Double 39 =
  7. 7.Double 68 =
  8. 8.Double 42 =
  9. 9.Half of 42 =
  10. 10.Half of 56 =
  11. 11.Half of 52 =
  12. 12.Double 54 =
  13. 13.Double 65 =
  14. 14.Double 45 =
  15. 15.Half of 72 =
  16. 16.Double 82 =
  17. 17.Double 93 =
  18. 18.Half of 112 =
  19. 19.Half of 88 =
  20. 20.Half of 32 =
  21. 21.Half of 54 =
  22. 22.Half of 104 =
  23. 23.Half of 102 =
  24. 24.Double 52 =
  25. 25.Double 35 =
  26. 26.Double 97 =
  27. 27.Double 73 =
  28. 28.Half of 64 =
  29. 29.Double 27 =
  30. 30.Double 89 =
  31. 31.Double 75 =
  32. 32.Double 22 =
  33. 33.Double 19 =
  34. 34.Half of 86 =
  35. 35.Double 16 =
  36. 36.Half of 34 =
  37. 37.Half of 62 =
  38. 38.Half of 138 =
  39. 39.Double 61 =
  40. 40.Half of 24 =

Answer key

  1. 42
  2. 24
  3. 71
  4. 87
  5. 23
  6. 78
  7. 136
  8. 84
  9. 21
  10. 28
  11. 26
  12. 108
  13. 130
  14. 90
  15. 36
  16. 164
  17. 186
  18. 56
  19. 44
  20. 16
  21. 27
  22. 52
  23. 51
  24. 104
  25. 70
  26. 194
  27. 146
  28. 32
  29. 54
  30. 178
  31. 150
  32. 44
  33. 38
  34. 43
  35. 32
  36. 17
  37. 31
  38. 69
  39. 122
  40. 12

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