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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 38 · 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 51 =
  2. 2.Double 19 =
  3. 3.Double 16 =
  4. 4.Half of 102 =
  5. 5.Half of 194 =
  6. 6.Half of 92 =
  7. 7.Half of 84 =
  8. 8.Double 26 =
  9. 9.Double 33 =
  10. 10.Half of 42 =
  11. 11.Double 94 =
  12. 12.Double 85 =
  13. 13.Half of 142 =
  14. 14.Double 93 =
  15. 15.Double 15 =
  16. 16.Half of 106 =
  17. 17.Half of 188 =
  18. 18.Double 59 =
  19. 19.Double 61 =
  20. 20.Double 44 =
  21. 21.Half of 48 =
  22. 22.Double 67 =
  23. 23.Half of 146 =
  24. 24.Double 35 =
  25. 25.Half of 174 =
  26. 26.Half of 114 =
  27. 27.Half of 82 =
  28. 28.Half of 78 =
  29. 29.Double 91 =
  30. 30.Double 54 =
  31. 31.Double 81 =
  32. 32.Half of 64 =
  33. 33.Half of 38 =
  34. 34.Half of 178 =
  35. 35.Half of 32 =
  36. 36.Double 13 =
  37. 37.Double 55 =
  38. 38.Double 22 =
  39. 39.Double 23 =
  40. 40.Double 39 =

Answer key

  1. 102
  2. 38
  3. 32
  4. 51
  5. 97
  6. 46
  7. 42
  8. 52
  9. 66
  10. 21
  11. 188
  12. 170
  13. 71
  14. 186
  15. 30
  16. 53
  17. 94
  18. 118
  19. 122
  20. 88
  21. 24
  22. 134
  23. 73
  24. 70
  25. 87
  26. 57
  27. 41
  28. 39
  29. 182
  30. 108
  31. 162
  32. 32
  33. 19
  34. 89
  35. 16
  36. 26
  37. 110
  38. 44
  39. 46
  40. 78

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