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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 575 · 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 18 =
  2. 2.Double 97 =
  3. 3.Double 53 =
  4. 4.Half of 136 =
  5. 5.Double 42 =
  6. 6.Half of 26 =
  7. 7.Half of 186 =
  8. 8.Double 66 =
  9. 9.Half of 152 =
  10. 10.Double 75 =
  11. 11.Half of 174 =
  12. 12.Half of 172 =
  13. 13.Double 54 =
  14. 14.Half of 122 =
  15. 15.Double 12 =
  16. 16.Half of 32 =
  17. 17.Half of 52 =
  18. 18.Half of 168 =
  19. 19.Half of 88 =
  20. 20.Double 14 =
  21. 21.Double 17 =
  22. 22.Double 11 =
  23. 23.Double 13 =
  24. 24.Half of 92 =
  25. 25.Double 46 =
  26. 26.Half of 148 =
  27. 27.Half of 12 =
  28. 28.Half of 14 =
  29. 29.Double 41 =
  30. 30.Double 84 =
  31. 31.Double 43 =
  32. 32.Double 88 =
  33. 33.Double 18 =
  34. 34.Half of 116 =
  35. 35.Half of 124 =
  36. 36.Half of 86 =
  37. 37.Half of 98 =
  38. 38.Half of 74 =
  39. 39.Double 95 =
  40. 40.Double 21 =

Answer key

  1. 9
  2. 194
  3. 106
  4. 68
  5. 84
  6. 13
  7. 93
  8. 132
  9. 76
  10. 150
  11. 87
  12. 86
  13. 108
  14. 61
  15. 24
  16. 16
  17. 26
  18. 84
  19. 44
  20. 28
  21. 34
  22. 22
  23. 26
  24. 46
  25. 92
  26. 74
  27. 6
  28. 7
  29. 82
  30. 168
  31. 86
  32. 176
  33. 36
  34. 58
  35. 62
  36. 43
  37. 49
  38. 37
  39. 190
  40. 42

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