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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 463 · 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 57 =
  2. 2.Half of 106 =
  3. 3.Double 49 =
  4. 4.Half of 78 =
  5. 5.Half of 82 =
  6. 6.Double 95 =
  7. 7.Double 36 =
  8. 8.Half of 142 =
  9. 9.Half of 34 =
  10. 10.Half of 18 =
  11. 11.Double 82 =
  12. 12.Double 12 =
  13. 13.Double 91 =
  14. 14.Double 42 =
  15. 15.Double 34 =
  16. 16.Double 41 =
  17. 17.Half of 156 =
  18. 18.Double 81 =
  19. 19.Double 74 =
  20. 20.Double 24 =
  21. 21.Half of 62 =
  22. 22.Double 51 =
  23. 23.Half of 172 =
  24. 24.Double 63 =
  25. 25.Half of 22 =
  26. 26.Half of 146 =
  27. 27.Half of 152 =
  28. 28.Half of 112 =
  29. 29.Half of 32 =
  30. 30.Half of 58 =
  31. 31.Half of 144 =
  32. 32.Double 55 =
  33. 33.Half of 48 =
  34. 34.Half of 194 =
  35. 35.Half of 122 =
  36. 36.Double 76 =
  37. 37.Half of 86 =
  38. 38.Double 21 =
  39. 39.Half of 158 =
  40. 40.Half of 52 =

Answer key

  1. 114
  2. 53
  3. 98
  4. 39
  5. 41
  6. 190
  7. 72
  8. 71
  9. 17
  10. 9
  11. 164
  12. 24
  13. 182
  14. 84
  15. 68
  16. 82
  17. 78
  18. 162
  19. 148
  20. 48
  21. 31
  22. 102
  23. 86
  24. 126
  25. 11
  26. 73
  27. 76
  28. 56
  29. 16
  30. 29
  31. 72
  32. 110
  33. 24
  34. 97
  35. 61
  36. 152
  37. 43
  38. 42
  39. 79
  40. 26

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