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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 668 · 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 82 =
  2. 2.Half of 104 =
  3. 3.Half of 112 =
  4. 4.Half of 72 =
  5. 5.Half of 76 =
  6. 6.Double 62 =
  7. 7.Double 32 =
  8. 8.Double 93 =
  9. 9.Double 35 =
  10. 10.Double 21 =
  11. 11.Half of 154 =
  12. 12.Double 94 =
  13. 13.Half of 146 =
  14. 14.Double 15 =
  15. 15.Half of 108 =
  16. 16.Double 71 =
  17. 17.Double 89 =
  18. 18.Half of 22 =
  19. 19.Half of 86 =
  20. 20.Double 91 =
  21. 21.Half of 34 =
  22. 22.Half of 88 =
  23. 23.Double 69 =
  24. 24.Half of 162 =
  25. 25.Double 78 =
  26. 26.Half of 142 =
  27. 27.Double 57 =
  28. 28.Double 23 =
  29. 29.Double 11 =
  30. 30.Double 77 =
  31. 31.Double 18 =
  32. 32.Half of 66 =
  33. 33.Double 25 =
  34. 34.Double 81 =
  35. 35.Double 28 =
  36. 36.Half of 116 =
  37. 37.Half of 188 =
  38. 38.Double 27 =
  39. 39.Half of 192 =
  40. 40.Half of 74 =

Answer key

  1. 164
  2. 52
  3. 56
  4. 36
  5. 38
  6. 124
  7. 64
  8. 186
  9. 70
  10. 42
  11. 77
  12. 188
  13. 73
  14. 30
  15. 54
  16. 142
  17. 178
  18. 11
  19. 43
  20. 182
  21. 17
  22. 44
  23. 138
  24. 81
  25. 156
  26. 71
  27. 114
  28. 46
  29. 22
  30. 154
  31. 36
  32. 33
  33. 50
  34. 162
  35. 56
  36. 58
  37. 94
  38. 54
  39. 96
  40. 37

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