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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 657 · 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 102 =
  2. 2.Half of 164 =
  3. 3.Double 47 =
  4. 4.Double 22 =
  5. 5.Half of 86 =
  6. 6.Half of 186 =
  7. 7.Double 42 =
  8. 8.Half of 122 =
  9. 9.Half of 168 =
  10. 10.Double 39 =
  11. 11.Double 31 =
  12. 12.Half of 52 =
  13. 13.Double 81 =
  14. 14.Half of 94 =
  15. 15.Double 64 =
  16. 16.Double 85 =
  17. 17.Double 46 =
  18. 18.Half of 96 =
  19. 19.Half of 176 =
  20. 20.Double 21 =
  21. 21.Half of 92 =
  22. 22.Double 45 =
  23. 23.Double 51 =
  24. 24.Half of 82 =
  25. 25.Half of 192 =
  26. 26.Double 86 =
  27. 27.Half of 12 =
  28. 28.Half of 134 =
  29. 29.Half of 138 =
  30. 30.Half of 56 =
  31. 31.Double 37 =
  32. 32.Double 77 =
  33. 33.Double 23 =
  34. 34.Double 91 =
  35. 35.Double 56 =
  36. 36.Half of 198 =
  37. 37.Double 71 =
  38. 38.Half of 46 =
  39. 39.Half of 156 =
  40. 40.Half of 162 =

Answer key

  1. 51
  2. 82
  3. 94
  4. 44
  5. 43
  6. 93
  7. 84
  8. 61
  9. 84
  10. 78
  11. 62
  12. 26
  13. 162
  14. 47
  15. 128
  16. 170
  17. 92
  18. 48
  19. 88
  20. 42
  21. 46
  22. 90
  23. 102
  24. 41
  25. 96
  26. 172
  27. 6
  28. 67
  29. 69
  30. 28
  31. 74
  32. 154
  33. 46
  34. 182
  35. 112
  36. 99
  37. 142
  38. 23
  39. 78
  40. 81

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