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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 17 · 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 122 =
  2. 2.Half of 28 =
  3. 3.Double 44 =
  4. 4.Double 36 =
  5. 5.Half of 136 =
  6. 6.Half of 46 =
  7. 7.Half of 26 =
  8. 8.Half of 118 =
  9. 9.Double 26 =
  10. 10.Double 18 =
  11. 11.Double 11 =
  12. 12.Half of 62 =
  13. 13.Half of 158 =
  14. 14.Double 65 =
  15. 15.Double 95 =
  16. 16.Double 41 =
  17. 17.Double 39 =
  18. 18.Double 48 =
  19. 19.Double 32 =
  20. 20.Double 86 =
  21. 21.Double 23 =
  22. 22.Double 21 =
  23. 23.Half of 44 =
  24. 24.Double 19 =
  25. 25.Double 17 =
  26. 26.Double 97 =
  27. 27.Double 64 =
  28. 28.Half of 24 =
  29. 29.Double 14 =
  30. 30.Double 82 =
  31. 31.Half of 34 =
  32. 32.Half of 96 =
  33. 33.Half of 12 =
  34. 34.Double 85 =
  35. 35.Double 15 =
  36. 36.Half of 48 =
  37. 37.Half of 174 =
  38. 38.Half of 156 =
  39. 39.Half of 124 =
  40. 40.Double 61 =

Answer key

  1. 61
  2. 14
  3. 88
  4. 72
  5. 68
  6. 23
  7. 13
  8. 59
  9. 52
  10. 36
  11. 22
  12. 31
  13. 79
  14. 130
  15. 190
  16. 82
  17. 78
  18. 96
  19. 64
  20. 172
  21. 46
  22. 42
  23. 22
  24. 38
  25. 34
  26. 194
  27. 128
  28. 12
  29. 28
  30. 164
  31. 17
  32. 48
  33. 6
  34. 170
  35. 30
  36. 24
  37. 87
  38. 78
  39. 62
  40. 122

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