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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 535 · 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 87 =
  2. 2.Double 32 =
  3. 3.Double 19 =
  4. 4.Double 53 =
  5. 5.Double 28 =
  6. 6.Double 46 =
  7. 7.Double 25 =
  8. 8.Double 62 =
  9. 9.Half of 32 =
  10. 10.Half of 122 =
  11. 11.Double 54 =
  12. 12.Double 85 =
  13. 13.Double 99 =
  14. 14.Double 33 =
  15. 15.Double 18 =
  16. 16.Half of 12 =
  17. 17.Half of 166 =
  18. 18.Double 89 =
  19. 19.Half of 42 =
  20. 20.Half of 82 =
  21. 21.Half of 52 =
  22. 22.Double 91 =
  23. 23.Half of 64 =
  24. 24.Double 34 =
  25. 25.Double 56 =
  26. 26.Double 43 =
  27. 27.Half of 28 =
  28. 28.Double 68 =
  29. 29.Half of 58 =
  30. 30.Half of 154 =
  31. 31.Half of 174 =
  32. 32.Half of 62 =
  33. 33.Half of 182 =
  34. 34.Half of 54 =
  35. 35.Double 31 =
  36. 36.Half of 132 =
  37. 37.Double 38 =
  38. 38.Double 77 =
  39. 39.Half of 96 =
  40. 40.Half of 112 =

Answer key

  1. 174
  2. 64
  3. 38
  4. 106
  5. 56
  6. 92
  7. 50
  8. 124
  9. 16
  10. 61
  11. 108
  12. 170
  13. 198
  14. 66
  15. 36
  16. 6
  17. 83
  18. 178
  19. 21
  20. 41
  21. 26
  22. 182
  23. 32
  24. 68
  25. 112
  26. 86
  27. 14
  28. 136
  29. 29
  30. 77
  31. 87
  32. 31
  33. 91
  34. 27
  35. 62
  36. 66
  37. 76
  38. 154
  39. 48
  40. 56

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