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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 423 · 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 142 =
  2. 2.Half of 72 =
  3. 3.Double 27 =
  4. 4.Double 11 =
  5. 5.Half of 146 =
  6. 6.Double 65 =
  7. 7.Double 41 =
  8. 8.Half of 32 =
  9. 9.Double 96 =
  10. 10.Double 82 =
  11. 11.Half of 22 =
  12. 12.Half of 12 =
  13. 13.Double 68 =
  14. 14.Double 46 =
  15. 15.Double 31 =
  16. 16.Double 52 =
  17. 17.Double 13 =
  18. 18.Double 92 =
  19. 19.Double 39 =
  20. 20.Double 24 =
  21. 21.Half of 112 =
  22. 22.Double 77 =
  23. 23.Half of 172 =
  24. 24.Double 51 =
  25. 25.Half of 82 =
  26. 26.Double 91 =
  27. 27.Half of 166 =
  28. 28.Double 26 =
  29. 29.Double 85 =
  30. 30.Double 19 =
  31. 31.Half of 134 =
  32. 32.Half of 44 =
  33. 33.Double 18 =
  34. 34.Half of 132 =
  35. 35.Double 81 =
  36. 36.Double 28 =
  37. 37.Double 99 =
  38. 38.Double 55 =
  39. 39.Half of 38 =
  40. 40.Double 29 =

Answer key

  1. 71
  2. 36
  3. 54
  4. 22
  5. 73
  6. 130
  7. 82
  8. 16
  9. 192
  10. 164
  11. 11
  12. 6
  13. 136
  14. 92
  15. 62
  16. 104
  17. 26
  18. 184
  19. 78
  20. 48
  21. 56
  22. 154
  23. 86
  24. 102
  25. 41
  26. 182
  27. 83
  28. 52
  29. 170
  30. 38
  31. 67
  32. 22
  33. 36
  34. 66
  35. 162
  36. 56
  37. 198
  38. 110
  39. 19
  40. 58

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