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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 355 · 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 65 =
  2. 2.Half of 172 =
  3. 3.Half of 134 =
  4. 4.Half of 52 =
  5. 5.Half of 64 =
  6. 6.Double 64 =
  7. 7.Half of 74 =
  8. 8.Half of 92 =
  9. 9.Double 13 =
  10. 10.Half of 152 =
  11. 11.Double 45 =
  12. 12.Half of 176 =
  13. 13.Double 61 =
  14. 14.Half of 108 =
  15. 15.Half of 146 =
  16. 16.Half of 44 =
  17. 17.Half of 154 =
  18. 18.Double 59 =
  19. 19.Double 46 =
  20. 20.Half of 94 =
  21. 21.Half of 72 =
  22. 22.Double 95 =
  23. 23.Half of 58 =
  24. 24.Double 11 =
  25. 25.Double 27 =
  26. 26.Half of 14 =
  27. 27.Half of 82 =
  28. 28.Double 57 =
  29. 29.Half of 84 =
  30. 30.Double 22 =
  31. 31.Double 71 =
  32. 32.Double 49 =
  33. 33.Double 35 =
  34. 34.Half of 22 =
  35. 35.Double 75 =
  36. 36.Half of 122 =
  37. 37.Half of 124 =
  38. 38.Double 29 =
  39. 39.Double 14 =
  40. 40.Half of 28 =

Answer key

  1. 130
  2. 86
  3. 67
  4. 26
  5. 32
  6. 128
  7. 37
  8. 46
  9. 26
  10. 76
  11. 90
  12. 88
  13. 122
  14. 54
  15. 73
  16. 22
  17. 77
  18. 118
  19. 92
  20. 47
  21. 36
  22. 190
  23. 29
  24. 22
  25. 54
  26. 7
  27. 41
  28. 114
  29. 42
  30. 44
  31. 142
  32. 98
  33. 70
  34. 11
  35. 150
  36. 61
  37. 62
  38. 58
  39. 28
  40. 14

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