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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 966 · 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 54 =
  2. 2.Half of 42 =
  3. 3.Half of 174 =
  4. 4.Half of 32 =
  5. 5.Half of 106 =
  6. 6.Half of 136 =
  7. 7.Half of 118 =
  8. 8.Half of 104 =
  9. 9.Half of 112 =
  10. 10.Half of 14 =
  11. 11.Double 14 =
  12. 12.Half of 132 =
  13. 13.Double 72 =
  14. 14.Double 31 =
  15. 15.Double 46 =
  16. 16.Double 91 =
  17. 17.Double 21 =
  18. 18.Double 18 =
  19. 19.Half of 76 =
  20. 20.Half of 68 =
  21. 21.Double 56 =
  22. 22.Half of 22 =
  23. 23.Half of 116 =
  24. 24.Double 68 =
  25. 25.Half of 164 =
  26. 26.Double 28 =
  27. 27.Double 48 =
  28. 28.Double 29 =
  29. 29.Double 27 =
  30. 30.Double 24 =
  31. 31.Half of 84 =
  32. 32.Double 84 =
  33. 33.Double 71 =
  34. 34.Double 87 =
  35. 35.Half of 66 =
  36. 36.Double 26 =
  37. 37.Half of 154 =
  38. 38.Double 86 =
  39. 39.Half of 158 =
  40. 40.Double 45 =

Answer key

  1. 108
  2. 21
  3. 87
  4. 16
  5. 53
  6. 68
  7. 59
  8. 52
  9. 56
  10. 7
  11. 28
  12. 66
  13. 144
  14. 62
  15. 92
  16. 182
  17. 42
  18. 36
  19. 38
  20. 34
  21. 112
  22. 11
  23. 58
  24. 136
  25. 82
  26. 56
  27. 96
  28. 58
  29. 54
  30. 48
  31. 42
  32. 168
  33. 142
  34. 174
  35. 33
  36. 52
  37. 77
  38. 172
  39. 79
  40. 90

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