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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 705 · 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 91 =
  2. 2.Half of 62 =
  3. 3.Double 49 =
  4. 4.Double 43 =
  5. 5.Half of 164 =
  6. 6.Double 33 =
  7. 7.Half of 24 =
  8. 8.Half of 112 =
  9. 9.Half of 102 =
  10. 10.Half of 32 =
  11. 11.Double 77 =
  12. 12.Half of 94 =
  13. 13.Half of 44 =
  14. 14.Half of 172 =
  15. 15.Half of 16 =
  16. 16.Half of 36 =
  17. 17.Double 83 =
  18. 18.Half of 82 =
  19. 19.Double 14 =
  20. 20.Half of 12 =
  21. 21.Double 69 =
  22. 22.Double 51 =
  23. 23.Half of 86 =
  24. 24.Double 62 =
  25. 25.Double 61 =
  26. 26.Half of 92 =
  27. 27.Half of 26 =
  28. 28.Double 26 =
  29. 29.Double 19 =
  30. 30.Double 18 =
  31. 31.Double 21 =
  32. 32.Double 85 =
  33. 33.Half of 124 =
  34. 34.Double 67 =
  35. 35.Double 68 =
  36. 36.Double 13 =
  37. 37.Double 66 =
  38. 38.Half of 52 =
  39. 39.Double 64 =
  40. 40.Double 65 =

Answer key

  1. 182
  2. 31
  3. 98
  4. 86
  5. 82
  6. 66
  7. 12
  8. 56
  9. 51
  10. 16
  11. 154
  12. 47
  13. 22
  14. 86
  15. 8
  16. 18
  17. 166
  18. 41
  19. 28
  20. 6
  21. 138
  22. 102
  23. 43
  24. 124
  25. 122
  26. 46
  27. 13
  28. 52
  29. 38
  30. 36
  31. 42
  32. 170
  33. 62
  34. 134
  35. 136
  36. 26
  37. 132
  38. 26
  39. 128
  40. 130

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