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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 492 · 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.Half of 78 =
  2. 2.Half of 86 =
  3. 3.Double 16 =
  4. 4.Half of 32 =
  5. 5.Half of 136 =
  6. 6.Double 85 =
  7. 7.Double 74 =
  8. 8.Double 21 =
  9. 9.Half of 92 =
  10. 10.Half of 58 =
  11. 11.Double 45 =
  12. 12.Half of 148 =
  13. 13.Half of 62 =
  14. 14.Double 27 =
  15. 15.Double 22 =
  16. 16.Double 53 =
  17. 17.Half of 42 =
  18. 18.Double 28 =
  19. 19.Double 77 =
  20. 20.Half of 22 =
  21. 21.Half of 106 =
  22. 22.Half of 184 =
  23. 23.Double 51 =
  24. 24.Half of 128 =
  25. 25.Half of 142 =
  26. 26.Half of 98 =
  27. 27.Half of 82 =
  28. 28.Double 46 =
  29. 29.Half of 192 =
  30. 30.Double 15 =
  31. 31.Half of 14 =
  32. 32.Double 69 =
  33. 33.Double 71 =
  34. 34.Half of 156 =
  35. 35.Double 17 =
  36. 36.Half of 18 =
  37. 37.Double 54 =
  38. 38.Double 35 =
  39. 39.Double 61 =
  40. 40.Double 97 =

Answer key

  1. 39
  2. 43
  3. 32
  4. 16
  5. 68
  6. 170
  7. 148
  8. 42
  9. 46
  10. 29
  11. 90
  12. 74
  13. 31
  14. 54
  15. 44
  16. 106
  17. 21
  18. 56
  19. 154
  20. 11
  21. 53
  22. 92
  23. 102
  24. 64
  25. 71
  26. 49
  27. 41
  28. 92
  29. 96
  30. 30
  31. 7
  32. 138
  33. 142
  34. 78
  35. 34
  36. 9
  37. 108
  38. 70
  39. 122
  40. 194

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