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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 816 · 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 72 =
  2. 2.Double 52 =
  3. 3.Double 43 =
  4. 4.Half of 94 =
  5. 5.Half of 106 =
  6. 6.Half of 176 =
  7. 7.Double 86 =
  8. 8.Double 29 =
  9. 9.Double 45 =
  10. 10.Double 61 =
  11. 11.Half of 98 =
  12. 12.Double 41 =
  13. 13.Half of 154 =
  14. 14.Half of 152 =
  15. 15.Double 38 =
  16. 16.Double 15 =
  17. 17.Half of 162 =
  18. 18.Double 21 =
  19. 19.Half of 172 =
  20. 20.Double 27 =
  21. 21.Double 22 =
  22. 22.Double 36 =
  23. 23.Double 26 =
  24. 24.Half of 132 =
  25. 25.Double 78 =
  26. 26.Double 85 =
  27. 27.Half of 194 =
  28. 28.Half of 84 =
  29. 29.Double 23 =
  30. 30.Half of 22 =
  31. 31.Double 37 =
  32. 32.Double 95 =
  33. 33.Double 77 =
  34. 34.Double 33 =
  35. 35.Half of 16 =
  36. 36.Double 31 =
  37. 37.Half of 72 =
  38. 38.Half of 112 =
  39. 39.Double 24 =
  40. 40.Double 69 =

Answer key

  1. 144
  2. 104
  3. 86
  4. 47
  5. 53
  6. 88
  7. 172
  8. 58
  9. 90
  10. 122
  11. 49
  12. 82
  13. 77
  14. 76
  15. 76
  16. 30
  17. 81
  18. 42
  19. 86
  20. 54
  21. 44
  22. 72
  23. 52
  24. 66
  25. 156
  26. 170
  27. 97
  28. 42
  29. 46
  30. 11
  31. 74
  32. 190
  33. 154
  34. 66
  35. 8
  36. 62
  37. 36
  38. 56
  39. 48
  40. 138

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