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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 806 · 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 97 =
  2. 2.Half of 198 =
  3. 3.Half of 98 =
  4. 4.Half of 162 =
  5. 5.Half of 108 =
  6. 6.Double 66 =
  7. 7.Half of 76 =
  8. 8.Half of 72 =
  9. 9.Half of 102 =
  10. 10.Half of 26 =
  11. 11.Half of 66 =
  12. 12.Half of 174 =
  13. 13.Half of 42 =
  14. 14.Double 45 =
  15. 15.Double 78 =
  16. 16.Half of 14 =
  17. 17.Half of 22 =
  18. 18.Double 99 =
  19. 19.Double 77 =
  20. 20.Double 81 =
  21. 21.Double 28 =
  22. 22.Double 51 =
  23. 23.Double 61 =
  24. 24.Double 21 =
  25. 25.Double 75 =
  26. 26.Half of 28 =
  27. 27.Double 22 =
  28. 28.Double 17 =
  29. 29.Double 33 =
  30. 30.Half of 82 =
  31. 31.Half of 16 =
  32. 32.Half of 88 =
  33. 33.Double 56 =
  34. 34.Double 94 =
  35. 35.Double 71 =
  36. 36.Double 13 =
  37. 37.Half of 44 =
  38. 38.Double 31 =
  39. 39.Double 29 =
  40. 40.Half of 52 =

Answer key

  1. 194
  2. 99
  3. 49
  4. 81
  5. 54
  6. 132
  7. 38
  8. 36
  9. 51
  10. 13
  11. 33
  12. 87
  13. 21
  14. 90
  15. 156
  16. 7
  17. 11
  18. 198
  19. 154
  20. 162
  21. 56
  22. 102
  23. 122
  24. 42
  25. 150
  26. 14
  27. 44
  28. 34
  29. 66
  30. 41
  31. 8
  32. 44
  33. 112
  34. 188
  35. 142
  36. 26
  37. 22
  38. 62
  39. 58
  40. 26

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