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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 585 · 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 76 =
  2. 2.Double 45 =
  3. 3.Half of 74 =
  4. 4.Double 87 =
  5. 5.Half of 172 =
  6. 6.Half of 18 =
  7. 7.Half of 132 =
  8. 8.Double 81 =
  9. 9.Half of 168 =
  10. 10.Double 55 =
  11. 11.Half of 42 =
  12. 12.Half of 12 =
  13. 13.Half of 14 =
  14. 14.Double 12 =
  15. 15.Half of 112 =
  16. 16.Half of 142 =
  17. 17.Double 91 =
  18. 18.Half of 24 =
  19. 19.Half of 26 =
  20. 20.Double 27 =
  21. 21.Half of 22 =
  22. 22.Half of 134 =
  23. 23.Double 97 =
  24. 24.Half of 122 =
  25. 25.Double 76 =
  26. 26.Double 49 =
  27. 27.Half of 86 =
  28. 28.Half of 118 =
  29. 29.Half of 16 =
  30. 30.Half of 36 =
  31. 31.Double 35 =
  32. 32.Half of 148 =
  33. 33.Double 28 =
  34. 34.Half of 162 =
  35. 35.Half of 178 =
  36. 36.Half of 192 =
  37. 37.Double 11 =
  38. 38.Half of 106 =
  39. 39.Double 48 =
  40. 40.Half of 66 =

Answer key

  1. 38
  2. 90
  3. 37
  4. 174
  5. 86
  6. 9
  7. 66
  8. 162
  9. 84
  10. 110
  11. 21
  12. 6
  13. 7
  14. 24
  15. 56
  16. 71
  17. 182
  18. 12
  19. 13
  20. 54
  21. 11
  22. 67
  23. 194
  24. 61
  25. 152
  26. 98
  27. 43
  28. 59
  29. 8
  30. 18
  31. 70
  32. 74
  33. 56
  34. 81
  35. 89
  36. 96
  37. 22
  38. 53
  39. 96
  40. 33

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