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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 307 · 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 26 =
  2. 2.Half of 56 =
  3. 3.Half of 102 =
  4. 4.Double 41 =
  5. 5.Half of 14 =
  6. 6.Double 32 =
  7. 7.Half of 42 =
  8. 8.Half of 112 =
  9. 9.Half of 134 =
  10. 10.Double 61 =
  11. 11.Half of 52 =
  12. 12.Half of 28 =
  13. 13.Half of 138 =
  14. 14.Double 98 =
  15. 15.Half of 174 =
  16. 16.Half of 88 =
  17. 17.Half of 122 =
  18. 18.Half of 22 =
  19. 19.Half of 54 =
  20. 20.Double 29 =
  21. 21.Half of 72 =
  22. 22.Double 53 =
  23. 23.Double 66 =
  24. 24.Double 24 =
  25. 25.Double 94 =
  26. 26.Double 49 =
  27. 27.Half of 164 =
  28. 28.Half of 44 =
  29. 29.Double 81 =
  30. 30.Double 14 =
  31. 31.Half of 192 =
  32. 32.Half of 146 =
  33. 33.Double 15 =
  34. 34.Double 85 =
  35. 35.Half of 94 =
  36. 36.Double 42 =
  37. 37.Double 35 =
  38. 38.Double 46 =
  39. 39.Half of 74 =
  40. 40.Double 18 =

Answer key

  1. 52
  2. 28
  3. 51
  4. 82
  5. 7
  6. 64
  7. 21
  8. 56
  9. 67
  10. 122
  11. 26
  12. 14
  13. 69
  14. 196
  15. 87
  16. 44
  17. 61
  18. 11
  19. 27
  20. 58
  21. 36
  22. 106
  23. 132
  24. 48
  25. 188
  26. 98
  27. 82
  28. 22
  29. 162
  30. 28
  31. 96
  32. 73
  33. 30
  34. 170
  35. 47
  36. 84
  37. 70
  38. 92
  39. 37
  40. 36

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