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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 165 · 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 24 =
  2. 2.Double 46 =
  3. 3.Double 64 =
  4. 4.Double 41 =
  5. 5.Double 59 =
  6. 6.Double 87 =
  7. 7.Half of 168 =
  8. 8.Double 76 =
  9. 9.Half of 58 =
  10. 10.Double 39 =
  11. 11.Double 31 =
  12. 12.Half of 92 =
  13. 13.Double 96 =
  14. 14.Double 79 =
  15. 15.Double 53 =
  16. 16.Half of 132 =
  17. 17.Double 57 =
  18. 18.Half of 62 =
  19. 19.Double 86 =
  20. 20.Half of 78 =
  21. 21.Double 65 =
  22. 22.Double 29 =
  23. 23.Half of 48 =
  24. 24.Half of 178 =
  25. 25.Double 84 =
  26. 26.Double 44 =
  27. 27.Half of 18 =
  28. 28.Double 12 =
  29. 29.Double 21 =
  30. 30.Double 71 =
  31. 31.Half of 174 =
  32. 32.Double 42 =
  33. 33.Double 26 =
  34. 34.Half of 122 =
  35. 35.Half of 16 =
  36. 36.Half of 144 =
  37. 37.Half of 82 =
  38. 38.Half of 162 =
  39. 39.Double 91 =
  40. 40.Half of 46 =

Answer key

  1. 48
  2. 92
  3. 128
  4. 82
  5. 118
  6. 174
  7. 84
  8. 152
  9. 29
  10. 78
  11. 62
  12. 46
  13. 192
  14. 158
  15. 106
  16. 66
  17. 114
  18. 31
  19. 172
  20. 39
  21. 130
  22. 58
  23. 24
  24. 89
  25. 168
  26. 88
  27. 9
  28. 24
  29. 42
  30. 142
  31. 87
  32. 84
  33. 52
  34. 61
  35. 8
  36. 72
  37. 41
  38. 81
  39. 182
  40. 23

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