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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 735 · 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 132 =
  2. 2.Half of 42 =
  3. 3.Double 75 =
  4. 4.Half of 78 =
  5. 5.Double 44 =
  6. 6.Double 82 =
  7. 7.Double 58 =
  8. 8.Double 19 =
  9. 9.Half of 66 =
  10. 10.Double 42 =
  11. 11.Half of 108 =
  12. 12.Double 25 =
  13. 13.Half of 16 =
  14. 14.Half of 144 =
  15. 15.Half of 162 =
  16. 16.Half of 46 =
  17. 17.Half of 28 =
  18. 18.Double 88 =
  19. 19.Double 24 =
  20. 20.Half of 32 =
  21. 21.Double 21 =
  22. 22.Double 13 =
  23. 23.Half of 174 =
  24. 24.Double 97 =
  25. 25.Double 33 =
  26. 26.Double 51 =
  27. 27.Half of 54 =
  28. 28.Half of 24 =
  29. 29.Double 56 =
  30. 30.Double 54 =
  31. 31.Double 43 =
  32. 32.Double 85 =
  33. 33.Half of 104 =
  34. 34.Half of 94 =
  35. 35.Half of 122 =
  36. 36.Double 76 =
  37. 37.Half of 44 =
  38. 38.Half of 188 =
  39. 39.Half of 88 =
  40. 40.Half of 178 =

Answer key

  1. 66
  2. 21
  3. 150
  4. 39
  5. 88
  6. 164
  7. 116
  8. 38
  9. 33
  10. 84
  11. 54
  12. 50
  13. 8
  14. 72
  15. 81
  16. 23
  17. 14
  18. 176
  19. 48
  20. 16
  21. 42
  22. 26
  23. 87
  24. 194
  25. 66
  26. 102
  27. 27
  28. 12
  29. 112
  30. 108
  31. 86
  32. 170
  33. 52
  34. 47
  35. 61
  36. 152
  37. 22
  38. 94
  39. 44
  40. 89

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