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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 638 · 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 31 =
  2. 2.Half of 34 =
  3. 3.Half of 86 =
  4. 4.Double 39 =
  5. 5.Double 44 =
  6. 6.Double 41 =
  7. 7.Double 26 =
  8. 8.Half of 52 =
  9. 9.Double 37 =
  10. 10.Double 46 =
  11. 11.Double 54 =
  12. 12.Double 13 =
  13. 13.Half of 176 =
  14. 14.Half of 76 =
  15. 15.Double 17 =
  16. 16.Half of 72 =
  17. 17.Half of 44 =
  18. 18.Half of 172 =
  19. 19.Half of 134 =
  20. 20.Half of 46 =
  21. 21.Half of 32 =
  22. 22.Double 12 =
  23. 23.Double 65 =
  24. 24.Double 18 =
  25. 25.Half of 36 =
  26. 26.Double 42 =
  27. 27.Half of 192 =
  28. 28.Half of 194 =
  29. 29.Half of 104 =
  30. 30.Double 23 =
  31. 31.Half of 158 =
  32. 32.Half of 162 =
  33. 33.Double 22 =
  34. 34.Half of 26 =
  35. 35.Half of 124 =
  36. 36.Double 34 =
  37. 37.Double 97 =
  38. 38.Double 82 =
  39. 39.Double 29 =
  40. 40.Double 88 =

Answer key

  1. 62
  2. 17
  3. 43
  4. 78
  5. 88
  6. 82
  7. 52
  8. 26
  9. 74
  10. 92
  11. 108
  12. 26
  13. 88
  14. 38
  15. 34
  16. 36
  17. 22
  18. 86
  19. 67
  20. 23
  21. 16
  22. 24
  23. 130
  24. 36
  25. 18
  26. 84
  27. 96
  28. 97
  29. 52
  30. 46
  31. 79
  32. 81
  33. 44
  34. 13
  35. 62
  36. 68
  37. 194
  38. 164
  39. 58
  40. 176

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