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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 786 · 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 82 =
  2. 2.Double 16 =
  3. 3.Double 71 =
  4. 4.Double 55 =
  5. 5.Double 66 =
  6. 6.Double 31 =
  7. 7.Half of 162 =
  8. 8.Double 32 =
  9. 9.Half of 172 =
  10. 10.Half of 122 =
  11. 11.Half of 62 =
  12. 12.Double 46 =
  13. 13.Half of 58 =
  14. 14.Half of 108 =
  15. 15.Double 69 =
  16. 16.Half of 32 =
  17. 17.Double 34 =
  18. 18.Double 11 =
  19. 19.Double 68 =
  20. 20.Half of 52 =
  21. 21.Double 45 =
  22. 22.Double 18 =
  23. 23.Double 29 =
  24. 24.Double 81 =
  25. 25.Half of 94 =
  26. 26.Half of 44 =
  27. 27.Half of 42 =
  28. 28.Double 17 =
  29. 29.Half of 178 =
  30. 30.Double 57 =
  31. 31.Half of 22 =
  32. 32.Half of 158 =
  33. 33.Half of 92 =
  34. 34.Double 21 =
  35. 35.Half of 56 =
  36. 36.Double 27 =
  37. 37.Double 24 =
  38. 38.Double 77 =
  39. 39.Double 92 =
  40. 40.Half of 12 =

Answer key

  1. 164
  2. 32
  3. 142
  4. 110
  5. 132
  6. 62
  7. 81
  8. 64
  9. 86
  10. 61
  11. 31
  12. 92
  13. 29
  14. 54
  15. 138
  16. 16
  17. 68
  18. 22
  19. 136
  20. 26
  21. 90
  22. 36
  23. 58
  24. 162
  25. 47
  26. 22
  27. 21
  28. 34
  29. 89
  30. 114
  31. 11
  32. 79
  33. 46
  34. 42
  35. 28
  36. 54
  37. 48
  38. 154
  39. 184
  40. 6

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