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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 768 · 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 142 =
  2. 2.Half of 138 =
  3. 3.Double 96 =
  4. 4.Double 71 =
  5. 5.Half of 122 =
  6. 6.Double 47 =
  7. 7.Double 41 =
  8. 8.Half of 22 =
  9. 9.Double 69 =
  10. 10.Half of 104 =
  11. 11.Half of 78 =
  12. 12.Half of 42 =
  13. 13.Double 85 =
  14. 14.Half of 38 =
  15. 15.Half of 176 =
  16. 16.Half of 94 =
  17. 17.Double 57 =
  18. 18.Half of 28 =
  19. 19.Half of 92 =
  20. 20.Half of 172 =
  21. 21.Double 34 =
  22. 22.Double 19 =
  23. 23.Double 67 =
  24. 24.Double 62 =
  25. 25.Half of 112 =
  26. 26.Half of 152 =
  27. 27.Double 27 =
  28. 28.Double 91 =
  29. 29.Double 52 =
  30. 30.Half of 186 =
  31. 31.Half of 76 =
  32. 32.Double 98 =
  33. 33.Half of 102 =
  34. 34.Half of 154 =
  35. 35.Half of 36 =
  36. 36.Half of 168 =
  37. 37.Half of 96 =
  38. 38.Half of 24 =
  39. 39.Double 59 =
  40. 40.Double 61 =

Answer key

  1. 71
  2. 69
  3. 192
  4. 142
  5. 61
  6. 94
  7. 82
  8. 11
  9. 138
  10. 52
  11. 39
  12. 21
  13. 170
  14. 19
  15. 88
  16. 47
  17. 114
  18. 14
  19. 46
  20. 86
  21. 68
  22. 38
  23. 134
  24. 124
  25. 56
  26. 76
  27. 54
  28. 182
  29. 104
  30. 93
  31. 38
  32. 196
  33. 51
  34. 77
  35. 18
  36. 84
  37. 48
  38. 12
  39. 118
  40. 122

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