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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 588 · 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 172 =
  3. 3.Half of 84 =
  4. 4.Double 91 =
  5. 5.Double 88 =
  6. 6.Half of 182 =
  7. 7.Double 55 =
  8. 8.Double 73 =
  9. 9.Double 71 =
  10. 10.Double 69 =
  11. 11.Half of 112 =
  12. 12.Half of 132 =
  13. 13.Half of 32 =
  14. 14.Half of 44 =
  15. 15.Double 52 =
  16. 16.Double 41 =
  17. 17.Double 67 =
  18. 18.Double 31 =
  19. 19.Half of 16 =
  20. 20.Double 28 =
  21. 21.Double 47 =
  22. 22.Double 33 =
  23. 23.Half of 158 =
  24. 24.Half of 12 =
  25. 25.Half of 188 =
  26. 26.Half of 66 =
  27. 27.Double 78 =
  28. 28.Double 38 =
  29. 29.Half of 154 =
  30. 30.Double 27 =
  31. 31.Double 85 =
  32. 32.Double 16 =
  33. 33.Double 61 =
  34. 34.Half of 62 =
  35. 35.Half of 82 =
  36. 36.Double 77 =
  37. 37.Double 43 =
  38. 38.Half of 18 =
  39. 39.Double 32 =
  40. 40.Double 82 =

Answer key

  1. 51
  2. 86
  3. 42
  4. 182
  5. 176
  6. 91
  7. 110
  8. 146
  9. 142
  10. 138
  11. 56
  12. 66
  13. 16
  14. 22
  15. 104
  16. 82
  17. 134
  18. 62
  19. 8
  20. 56
  21. 94
  22. 66
  23. 79
  24. 6
  25. 94
  26. 33
  27. 156
  28. 76
  29. 77
  30. 54
  31. 170
  32. 32
  33. 122
  34. 31
  35. 41
  36. 154
  37. 86
  38. 9
  39. 64
  40. 164

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