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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 446 · 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 59 =
  2. 2.Half of 106 =
  3. 3.Double 83 =
  4. 4.Half of 16 =
  5. 5.Double 13 =
  6. 6.Half of 62 =
  7. 7.Double 85 =
  8. 8.Half of 14 =
  9. 9.Double 21 =
  10. 10.Half of 104 =
  11. 11.Double 12 =
  12. 12.Double 57 =
  13. 13.Half of 64 =
  14. 14.Double 67 =
  15. 15.Double 78 =
  16. 16.Half of 18 =
  17. 17.Double 93 =
  18. 18.Half of 72 =
  19. 19.Half of 126 =
  20. 20.Double 77 =
  21. 21.Double 49 =
  22. 22.Double 31 =
  23. 23.Double 38 =
  24. 24.Half of 114 =
  25. 25.Double 58 =
  26. 26.Half of 74 =
  27. 27.Double 19 =
  28. 28.Double 29 =
  29. 29.Half of 44 =
  30. 30.Double 63 =
  31. 31.Double 54 =
  32. 32.Double 45 =
  33. 33.Double 97 =
  34. 34.Double 53 =
  35. 35.Double 24 =
  36. 36.Double 81 =
  37. 37.Double 28 =
  38. 38.Double 34 =
  39. 39.Half of 158 =
  40. 40.Double 32 =

Answer key

  1. 118
  2. 53
  3. 166
  4. 8
  5. 26
  6. 31
  7. 170
  8. 7
  9. 42
  10. 52
  11. 24
  12. 114
  13. 32
  14. 134
  15. 156
  16. 9
  17. 186
  18. 36
  19. 63
  20. 154
  21. 98
  22. 62
  23. 76
  24. 57
  25. 116
  26. 37
  27. 38
  28. 58
  29. 22
  30. 126
  31. 108
  32. 90
  33. 194
  34. 106
  35. 48
  36. 162
  37. 56
  38. 68
  39. 79
  40. 64

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