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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 573 · 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 57 =
  2. 2.Half of 42 =
  3. 3.Half of 16 =
  4. 4.Half of 152 =
  5. 5.Half of 54 =
  6. 6.Half of 142 =
  7. 7.Double 41 =
  8. 8.Double 87 =
  9. 9.Double 59 =
  10. 10.Double 32 =
  11. 11.Half of 92 =
  12. 12.Half of 122 =
  13. 13.Double 83 =
  14. 14.Double 76 =
  15. 15.Double 21 =
  16. 16.Double 62 =
  17. 17.Half of 22 =
  18. 18.Double 31 =
  19. 19.Half of 34 =
  20. 20.Double 81 =
  21. 21.Half of 72 =
  22. 22.Double 15 =
  23. 23.Double 37 =
  24. 24.Double 91 =
  25. 25.Half of 12 =
  26. 26.Double 92 =
  27. 27.Double 19 =
  28. 28.Half of 68 =
  29. 29.Half of 182 =
  30. 30.Half of 104 =
  31. 31.Double 68 =
  32. 32.Double 61 =
  33. 33.Double 54 =
  34. 34.Half of 106 =
  35. 35.Double 36 =
  36. 36.Half of 74 =
  37. 37.Half of 14 =
  38. 38.Double 56 =
  39. 39.Double 48 =
  40. 40.Double 77 =

Answer key

  1. 114
  2. 21
  3. 8
  4. 76
  5. 27
  6. 71
  7. 82
  8. 174
  9. 118
  10. 64
  11. 46
  12. 61
  13. 166
  14. 152
  15. 42
  16. 124
  17. 11
  18. 62
  19. 17
  20. 162
  21. 36
  22. 30
  23. 74
  24. 182
  25. 6
  26. 184
  27. 38
  28. 34
  29. 91
  30. 52
  31. 136
  32. 122
  33. 108
  34. 53
  35. 72
  36. 37
  37. 7
  38. 112
  39. 96
  40. 154

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