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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 826 · 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 32 =
  2. 2.Double 15 =
  3. 3.Half of 32 =
  4. 4.Double 21 =
  5. 5.Double 97 =
  6. 6.Double 31 =
  7. 7.Double 38 =
  8. 8.Double 47 =
  9. 9.Double 63 =
  10. 10.Double 93 =
  11. 11.Half of 172 =
  12. 12.Half of 88 =
  13. 13.Double 74 =
  14. 14.Double 58 =
  15. 15.Double 25 =
  16. 16.Double 54 =
  17. 17.Double 23 =
  18. 18.Double 48 =
  19. 19.Half of 28 =
  20. 20.Double 52 =
  21. 21.Double 59 =
  22. 22.Half of 102 =
  23. 23.Double 61 =
  24. 24.Half of 26 =
  25. 25.Half of 186 =
  26. 26.Double 94 =
  27. 27.Half of 38 =
  28. 28.Double 81 =
  29. 29.Double 36 =
  30. 30.Double 71 =
  31. 31.Half of 98 =
  32. 32.Double 75 =
  33. 33.Half of 182 =
  34. 34.Double 33 =
  35. 35.Double 35 =
  36. 36.Double 68 =
  37. 37.Half of 146 =
  38. 38.Half of 126 =
  39. 39.Half of 156 =
  40. 40.Half of 62 =

Answer key

  1. 64
  2. 30
  3. 16
  4. 42
  5. 194
  6. 62
  7. 76
  8. 94
  9. 126
  10. 186
  11. 86
  12. 44
  13. 148
  14. 116
  15. 50
  16. 108
  17. 46
  18. 96
  19. 14
  20. 104
  21. 118
  22. 51
  23. 122
  24. 13
  25. 93
  26. 188
  27. 19
  28. 162
  29. 72
  30. 142
  31. 49
  32. 150
  33. 91
  34. 66
  35. 70
  36. 136
  37. 73
  38. 63
  39. 78
  40. 31

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