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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 823 · 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 34 =
  2. 2.Half of 56 =
  3. 3.Half of 132 =
  4. 4.Double 31 =
  5. 5.Double 29 =
  6. 6.Double 56 =
  7. 7.Double 97 =
  8. 8.Double 84 =
  9. 9.Half of 16 =
  10. 10.Double 18 =
  11. 11.Half of 122 =
  12. 12.Half of 118 =
  13. 13.Double 61 =
  14. 14.Half of 32 =
  15. 15.Double 17 =
  16. 16.Half of 24 =
  17. 17.Half of 72 =
  18. 18.Double 21 =
  19. 19.Half of 112 =
  20. 20.Half of 12 =
  21. 21.Half of 142 =
  22. 22.Double 72 =
  23. 23.Half of 176 =
  24. 24.Double 65 =
  25. 25.Double 47 =
  26. 26.Double 27 =
  27. 27.Double 94 =
  28. 28.Half of 84 =
  29. 29.Double 95 =
  30. 30.Double 67 =
  31. 31.Half of 108 =
  32. 32.Double 53 =
  33. 33.Double 46 =
  34. 34.Half of 134 =
  35. 35.Half of 162 =
  36. 36.Double 14 =
  37. 37.Half of 76 =
  38. 38.Half of 164 =
  39. 39.Half of 74 =
  40. 40.Half of 26 =

Answer key

  1. 68
  2. 28
  3. 66
  4. 62
  5. 58
  6. 112
  7. 194
  8. 168
  9. 8
  10. 36
  11. 61
  12. 59
  13. 122
  14. 16
  15. 34
  16. 12
  17. 36
  18. 42
  19. 56
  20. 6
  21. 71
  22. 144
  23. 88
  24. 130
  25. 94
  26. 54
  27. 188
  28. 42
  29. 190
  30. 134
  31. 54
  32. 106
  33. 92
  34. 67
  35. 81
  36. 28
  37. 38
  38. 82
  39. 37
  40. 13

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