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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 313 · 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 41 =
  2. 2.Double 31 =
  3. 3.Half of 76 =
  4. 4.Half of 122 =
  5. 5.Double 71 =
  6. 6.Double 69 =
  7. 7.Double 64 =
  8. 8.Double 13 =
  9. 9.Half of 104 =
  10. 10.Half of 94 =
  11. 11.Double 44 =
  12. 12.Half of 188 =
  13. 13.Double 58 =
  14. 14.Double 21 =
  15. 15.Half of 198 =
  16. 16.Double 96 =
  17. 17.Double 45 =
  18. 18.Half of 28 =
  19. 19.Half of 22 =
  20. 20.Double 89 =
  21. 21.Half of 42 =
  22. 22.Double 93 =
  23. 23.Double 77 =
  24. 24.Double 25 =
  25. 25.Double 48 =
  26. 26.Half of 84 =
  27. 27.Half of 52 =
  28. 28.Half of 172 =
  29. 29.Half of 64 =
  30. 30.Double 18 =
  31. 31.Double 61 =
  32. 32.Double 19 =
  33. 33.Double 34 =
  34. 34.Double 55 =
  35. 35.Double 59 =
  36. 36.Half of 112 =
  37. 37.Half of 138 =
  38. 38.Double 83 =
  39. 39.Double 76 =
  40. 40.Half of 168 =

Answer key

  1. 82
  2. 62
  3. 38
  4. 61
  5. 142
  6. 138
  7. 128
  8. 26
  9. 52
  10. 47
  11. 88
  12. 94
  13. 116
  14. 42
  15. 99
  16. 192
  17. 90
  18. 14
  19. 11
  20. 178
  21. 21
  22. 186
  23. 154
  24. 50
  25. 96
  26. 42
  27. 26
  28. 86
  29. 32
  30. 36
  31. 122
  32. 38
  33. 68
  34. 110
  35. 118
  36. 56
  37. 69
  38. 166
  39. 152
  40. 84

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