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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 809 · 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 57 =
  2. 2.Half of 122 =
  3. 3.Double 12 =
  4. 4.Double 63 =
  5. 5.Half of 102 =
  6. 6.Double 97 =
  7. 7.Double 53 =
  8. 8.Half of 192 =
  9. 9.Half of 144 =
  10. 10.Half of 114 =
  11. 11.Half of 12 =
  12. 12.Half of 182 =
  13. 13.Half of 126 =
  14. 14.Double 76 =
  15. 15.Double 45 =
  16. 16.Double 32 =
  17. 17.Double 41 =
  18. 18.Double 29 =
  19. 19.Half of 96 =
  20. 20.Half of 136 =
  21. 21.Double 49 =
  22. 22.Double 91 =
  23. 23.Double 22 =
  24. 24.Double 31 =
  25. 25.Double 68 =
  26. 26.Half of 92 =
  27. 27.Half of 64 =
  28. 28.Half of 52 =
  29. 29.Half of 158 =
  30. 30.Double 86 =
  31. 31.Half of 24 =
  32. 32.Half of 186 =
  33. 33.Half of 56 =
  34. 34.Half of 116 =
  35. 35.Double 83 =
  36. 36.Double 39 =
  37. 37.Half of 34 =
  38. 38.Double 98 =
  39. 39.Half of 156 =
  40. 40.Half of 142 =

Answer key

  1. 114
  2. 61
  3. 24
  4. 126
  5. 51
  6. 194
  7. 106
  8. 96
  9. 72
  10. 57
  11. 6
  12. 91
  13. 63
  14. 152
  15. 90
  16. 64
  17. 82
  18. 58
  19. 48
  20. 68
  21. 98
  22. 182
  23. 44
  24. 62
  25. 136
  26. 46
  27. 32
  28. 26
  29. 79
  30. 172
  31. 12
  32. 93
  33. 28
  34. 58
  35. 166
  36. 78
  37. 17
  38. 196
  39. 78
  40. 71

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