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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 576 · 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 15 =
  2. 2.Half of 142 =
  3. 3.Double 12 =
  4. 4.Double 56 =
  5. 5.Half of 94 =
  6. 6.Double 93 =
  7. 7.Half of 176 =
  8. 8.Double 18 =
  9. 9.Half of 96 =
  10. 10.Double 61 =
  11. 11.Half of 54 =
  12. 12.Double 35 =
  13. 13.Double 38 =
  14. 14.Double 32 =
  15. 15.Double 91 =
  16. 16.Double 36 =
  17. 17.Half of 74 =
  18. 18.Double 85 =
  19. 19.Half of 14 =
  20. 20.Double 97 =
  21. 21.Half of 46 =
  22. 22.Double 14 =
  23. 23.Double 78 =
  24. 24.Half of 78 =
  25. 25.Half of 98 =
  26. 26.Half of 174 =
  27. 27.Half of 134 =
  28. 28.Double 95 =
  29. 29.Double 13 =
  30. 30.Double 82 =
  31. 31.Double 23 =
  32. 32.Half of 158 =
  33. 33.Double 57 =
  34. 34.Double 28 =
  35. 35.Half of 22 =
  36. 36.Half of 156 =
  37. 37.Double 49 =
  38. 38.Double 21 =
  39. 39.Double 41 =
  40. 40.Half of 144 =

Answer key

  1. 30
  2. 71
  3. 24
  4. 112
  5. 47
  6. 186
  7. 88
  8. 36
  9. 48
  10. 122
  11. 27
  12. 70
  13. 76
  14. 64
  15. 182
  16. 72
  17. 37
  18. 170
  19. 7
  20. 194
  21. 23
  22. 28
  23. 156
  24. 39
  25. 49
  26. 87
  27. 67
  28. 190
  29. 26
  30. 164
  31. 46
  32. 79
  33. 114
  34. 56
  35. 11
  36. 78
  37. 98
  38. 42
  39. 82
  40. 72

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