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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 72 · 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 22 =
  2. 2.Half of 172 =
  3. 3.Double 21 =
  4. 4.Half of 122 =
  5. 5.Half of 164 =
  6. 6.Half of 62 =
  7. 7.Half of 178 =
  8. 8.Double 41 =
  9. 9.Half of 132 =
  10. 10.Double 47 =
  11. 11.Half of 16 =
  12. 12.Double 15 =
  13. 13.Double 42 =
  14. 14.Double 94 =
  15. 15.Half of 104 =
  16. 16.Double 52 =
  17. 17.Double 48 =
  18. 18.Double 82 =
  19. 19.Double 81 =
  20. 20.Double 86 =
  21. 21.Half of 66 =
  22. 22.Half of 124 =
  23. 23.Double 91 =
  24. 24.Double 23 =
  25. 25.Half of 136 =
  26. 26.Double 31 =
  27. 27.Double 89 =
  28. 28.Half of 46 =
  29. 29.Double 35 =
  30. 30.Half of 32 =
  31. 31.Double 71 =
  32. 32.Double 72 =
  33. 33.Half of 156 =
  34. 34.Double 66 =
  35. 35.Double 14 =
  36. 36.Half of 88 =
  37. 37.Double 51 =
  38. 38.Half of 86 =
  39. 39.Double 58 =
  40. 40.Half of 72 =

Answer key

  1. 11
  2. 86
  3. 42
  4. 61
  5. 82
  6. 31
  7. 89
  8. 82
  9. 66
  10. 94
  11. 8
  12. 30
  13. 84
  14. 188
  15. 52
  16. 104
  17. 96
  18. 164
  19. 162
  20. 172
  21. 33
  22. 62
  23. 182
  24. 46
  25. 68
  26. 62
  27. 178
  28. 23
  29. 70
  30. 16
  31. 142
  32. 144
  33. 78
  34. 132
  35. 28
  36. 44
  37. 102
  38. 43
  39. 116
  40. 36

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