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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 288 · 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.Double 11 =
  3. 3.Double 27 =
  4. 4.Double 26 =
  5. 5.Double 99 =
  6. 6.Half of 184 =
  7. 7.Double 24 =
  8. 8.Half of 166 =
  9. 9.Half of 64 =
  10. 10.Double 57 =
  11. 11.Double 48 =
  12. 12.Double 32 =
  13. 13.Double 12 =
  14. 14.Half of 182 =
  15. 15.Half of 24 =
  16. 16.Double 56 =
  17. 17.Half of 188 =
  18. 18.Half of 162 =
  19. 19.Double 22 =
  20. 20.Half of 164 =
  21. 21.Half of 116 =
  22. 22.Half of 198 =
  23. 23.Double 16 =
  24. 24.Double 84 =
  25. 25.Double 98 =
  26. 26.Half of 142 =
  27. 27.Half of 114 =
  28. 28.Half of 42 =
  29. 29.Double 17 =
  30. 30.Half of 52 =
  31. 31.Double 41 =
  32. 32.Half of 12 =
  33. 33.Double 31 =
  34. 34.Double 77 =
  35. 35.Half of 122 =
  36. 36.Double 25 =
  37. 37.Double 42 =
  38. 38.Double 13 =
  39. 39.Half of 194 =
  40. 40.Half of 78 =

Answer key

  1. 102
  2. 22
  3. 54
  4. 52
  5. 198
  6. 92
  7. 48
  8. 83
  9. 32
  10. 114
  11. 96
  12. 64
  13. 24
  14. 91
  15. 12
  16. 112
  17. 94
  18. 81
  19. 44
  20. 82
  21. 58
  22. 99
  23. 32
  24. 168
  25. 196
  26. 71
  27. 57
  28. 21
  29. 34
  30. 26
  31. 82
  32. 6
  33. 62
  34. 154
  35. 61
  36. 50
  37. 84
  38. 26
  39. 97
  40. 39

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