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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 533 · 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 21 =
  2. 2.Double 79 =
  3. 3.Half of 44 =
  4. 4.Half of 146 =
  5. 5.Double 65 =
  6. 6.Half of 38 =
  7. 7.Double 17 =
  8. 8.Half of 92 =
  9. 9.Half of 54 =
  10. 10.Double 91 =
  11. 11.Half of 122 =
  12. 12.Half of 188 =
  13. 13.Double 76 =
  14. 14.Half of 108 =
  15. 15.Double 41 =
  16. 16.Double 55 =
  17. 17.Double 31 =
  18. 18.Half of 62 =
  19. 19.Double 35 =
  20. 20.Half of 32 =
  21. 21.Double 63 =
  22. 22.Half of 162 =
  23. 23.Double 62 =
  24. 24.Half of 28 =
  25. 25.Double 89 =
  26. 26.Half of 12 =
  27. 27.Half of 194 =
  28. 28.Double 51 =
  29. 29.Double 29 =
  30. 30.Double 81 =
  31. 31.Half of 114 =
  32. 32.Double 64 =
  33. 33.Double 61 =
  34. 34.Double 97 =
  35. 35.Double 86 =
  36. 36.Double 71 =
  37. 37.Half of 74 =
  38. 38.Half of 142 =
  39. 39.Half of 196 =
  40. 40.Double 53 =

Answer key

  1. 42
  2. 158
  3. 22
  4. 73
  5. 130
  6. 19
  7. 34
  8. 46
  9. 27
  10. 182
  11. 61
  12. 94
  13. 152
  14. 54
  15. 82
  16. 110
  17. 62
  18. 31
  19. 70
  20. 16
  21. 126
  22. 81
  23. 124
  24. 14
  25. 178
  26. 6
  27. 97
  28. 102
  29. 58
  30. 162
  31. 57
  32. 128
  33. 122
  34. 194
  35. 172
  36. 142
  37. 37
  38. 71
  39. 98
  40. 106

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