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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 890 · 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 63 =
  2. 2.Half of 82 =
  3. 3.Double 35 =
  4. 4.Half of 132 =
  5. 5.Half of 28 =
  6. 6.Half of 22 =
  7. 7.Double 51 =
  8. 8.Half of 78 =
  9. 9.Double 66 =
  10. 10.Half of 104 =
  11. 11.Half of 54 =
  12. 12.Double 19 =
  13. 13.Double 33 =
  14. 14.Half of 188 =
  15. 15.Double 55 =
  16. 16.Double 41 =
  17. 17.Double 73 =
  18. 18.Half of 152 =
  19. 19.Half of 144 =
  20. 20.Double 45 =
  21. 21.Half of 128 =
  22. 22.Double 16 =
  23. 23.Half of 84 =
  24. 24.Half of 62 =
  25. 25.Double 77 =
  26. 26.Half of 76 =
  27. 27.Double 37 =
  28. 28.Double 32 =
  29. 29.Double 83 =
  30. 30.Double 46 =
  31. 31.Half of 172 =
  32. 32.Half of 106 =
  33. 33.Half of 74 =
  34. 34.Half of 122 =
  35. 35.Half of 26 =
  36. 36.Half of 154 =
  37. 37.Half of 52 =
  38. 38.Half of 58 =
  39. 39.Double 75 =
  40. 40.Double 81 =

Answer key

  1. 126
  2. 41
  3. 70
  4. 66
  5. 14
  6. 11
  7. 102
  8. 39
  9. 132
  10. 52
  11. 27
  12. 38
  13. 66
  14. 94
  15. 110
  16. 82
  17. 146
  18. 76
  19. 72
  20. 90
  21. 64
  22. 32
  23. 42
  24. 31
  25. 154
  26. 38
  27. 74
  28. 64
  29. 166
  30. 92
  31. 86
  32. 53
  33. 37
  34. 61
  35. 13
  36. 77
  37. 26
  38. 29
  39. 150
  40. 162

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