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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 367 · 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.Double 18 =
  3. 3.Half of 178 =
  4. 4.Half of 52 =
  5. 5.Double 66 =
  6. 6.Double 13 =
  7. 7.Double 82 =
  8. 8.Double 94 =
  9. 9.Half of 104 =
  10. 10.Double 69 =
  11. 11.Half of 74 =
  12. 12.Double 75 =
  13. 13.Double 81 =
  14. 14.Half of 156 =
  15. 15.Half of 108 =
  16. 16.Double 91 =
  17. 17.Double 85 =
  18. 18.Half of 64 =
  19. 19.Double 57 =
  20. 20.Double 88 =
  21. 21.Double 61 =
  22. 22.Double 12 =
  23. 23.Half of 102 =
  24. 24.Double 52 =
  25. 25.Half of 132 =
  26. 26.Half of 198 =
  27. 27.Double 62 =
  28. 28.Double 72 =
  29. 29.Half of 16 =
  30. 30.Half of 42 =
  31. 31.Half of 188 =
  32. 32.Double 38 =
  33. 33.Half of 38 =
  34. 34.Double 35 =
  35. 35.Double 27 =
  36. 36.Double 21 =
  37. 37.Double 26 =
  38. 38.Half of 34 =
  39. 39.Double 22 =
  40. 40.Double 14 =

Answer key

  1. 39
  2. 36
  3. 89
  4. 26
  5. 132
  6. 26
  7. 164
  8. 188
  9. 52
  10. 138
  11. 37
  12. 150
  13. 162
  14. 78
  15. 54
  16. 182
  17. 170
  18. 32
  19. 114
  20. 176
  21. 122
  22. 24
  23. 51
  24. 104
  25. 66
  26. 99
  27. 124
  28. 144
  29. 8
  30. 21
  31. 94
  32. 76
  33. 19
  34. 70
  35. 54
  36. 42
  37. 52
  38. 17
  39. 44
  40. 28

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