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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 86 · 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 41 =
  2. 2.Double 85 =
  3. 3.Double 11 =
  4. 4.Half of 142 =
  5. 5.Half of 56 =
  6. 6.Double 86 =
  7. 7.Half of 82 =
  8. 8.Double 37 =
  9. 9.Double 91 =
  10. 10.Half of 14 =
  11. 11.Double 15 =
  12. 12.Double 81 =
  13. 13.Double 45 =
  14. 14.Double 28 =
  15. 15.Half of 148 =
  16. 16.Double 77 =
  17. 17.Half of 124 =
  18. 18.Half of 26 =
  19. 19.Half of 44 =
  20. 20.Half of 154 =
  21. 21.Double 58 =
  22. 22.Double 31 =
  23. 23.Half of 32 =
  24. 24.Half of 182 =
  25. 25.Double 14 =
  26. 26.Double 56 =
  27. 27.Double 73 =
  28. 28.Double 52 =
  29. 29.Double 51 =
  30. 30.Half of 52 =
  31. 31.Double 25 =
  32. 32.Double 49 =
  33. 33.Double 76 =
  34. 34.Half of 16 =
  35. 35.Half of 42 =
  36. 36.Double 21 =
  37. 37.Half of 46 =
  38. 38.Half of 178 =
  39. 39.Half of 194 =
  40. 40.Half of 192 =

Answer key

  1. 82
  2. 170
  3. 22
  4. 71
  5. 28
  6. 172
  7. 41
  8. 74
  9. 182
  10. 7
  11. 30
  12. 162
  13. 90
  14. 56
  15. 74
  16. 154
  17. 62
  18. 13
  19. 22
  20. 77
  21. 116
  22. 62
  23. 16
  24. 91
  25. 28
  26. 112
  27. 146
  28. 104
  29. 102
  30. 26
  31. 50
  32. 98
  33. 152
  34. 8
  35. 21
  36. 42
  37. 23
  38. 89
  39. 97
  40. 96

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