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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 660 · 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 19 =
  2. 2.Half of 98 =
  3. 3.Half of 22 =
  4. 4.Half of 74 =
  5. 5.Double 99 =
  6. 6.Half of 12 =
  7. 7.Half of 82 =
  8. 8.Double 69 =
  9. 9.Double 71 =
  10. 10.Double 14 =
  11. 11.Double 33 =
  12. 12.Half of 52 =
  13. 13.Half of 184 =
  14. 14.Half of 92 =
  15. 15.Double 73 =
  16. 16.Double 11 =
  17. 17.Half of 46 =
  18. 18.Double 96 =
  19. 19.Double 91 =
  20. 20.Double 83 =
  21. 21.Half of 16 =
  22. 22.Half of 94 =
  23. 23.Double 93 =
  24. 24.Double 41 =
  25. 25.Double 77 =
  26. 26.Double 21 =
  27. 27.Half of 48 =
  28. 28.Half of 116 =
  29. 29.Double 34 =
  30. 30.Half of 138 =
  31. 31.Half of 152 =
  32. 32.Half of 172 =
  33. 33.Half of 18 =
  34. 34.Half of 64 =
  35. 35.Half of 134 =
  36. 36.Double 84 =
  37. 37.Half of 128 =
  38. 38.Double 85 =
  39. 39.Half of 56 =
  40. 40.Double 18 =

Answer key

  1. 38
  2. 49
  3. 11
  4. 37
  5. 198
  6. 6
  7. 41
  8. 138
  9. 142
  10. 28
  11. 66
  12. 26
  13. 92
  14. 46
  15. 146
  16. 22
  17. 23
  18. 192
  19. 182
  20. 166
  21. 8
  22. 47
  23. 186
  24. 82
  25. 154
  26. 42
  27. 24
  28. 58
  29. 68
  30. 69
  31. 76
  32. 86
  33. 9
  34. 32
  35. 67
  36. 168
  37. 64
  38. 170
  39. 28
  40. 36

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