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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 521 · 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 51 =
  2. 2.Half of 126 =
  3. 3.Half of 32 =
  4. 4.Double 97 =
  5. 5.Half of 54 =
  6. 6.Half of 198 =
  7. 7.Double 31 =
  8. 8.Double 95 =
  9. 9.Half of 22 =
  10. 10.Double 71 =
  11. 11.Half of 148 =
  12. 12.Half of 134 =
  13. 13.Half of 152 =
  14. 14.Double 47 =
  15. 15.Half of 24 =
  16. 16.Double 76 =
  17. 17.Double 13 =
  18. 18.Double 33 =
  19. 19.Double 26 =
  20. 20.Half of 18 =
  21. 21.Half of 168 =
  22. 22.Half of 92 =
  23. 23.Half of 156 =
  24. 24.Double 52 =
  25. 25.Half of 78 =
  26. 26.Double 57 =
  27. 27.Double 27 =
  28. 28.Double 87 =
  29. 29.Double 29 =
  30. 30.Half of 28 =
  31. 31.Half of 12 =
  32. 32.Double 96 =
  33. 33.Double 61 =
  34. 34.Half of 102 =
  35. 35.Double 67 =
  36. 36.Half of 124 =
  37. 37.Double 35 =
  38. 38.Double 36 =
  39. 39.Double 99 =
  40. 40.Double 48 =

Answer key

  1. 102
  2. 63
  3. 16
  4. 194
  5. 27
  6. 99
  7. 62
  8. 190
  9. 11
  10. 142
  11. 74
  12. 67
  13. 76
  14. 94
  15. 12
  16. 152
  17. 26
  18. 66
  19. 52
  20. 9
  21. 84
  22. 46
  23. 78
  24. 104
  25. 39
  26. 114
  27. 54
  28. 174
  29. 58
  30. 14
  31. 6
  32. 192
  33. 122
  34. 51
  35. 134
  36. 62
  37. 70
  38. 72
  39. 198
  40. 96

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