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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 874 · 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 61 =
  2. 2.Half of 64 =
  3. 3.Half of 118 =
  4. 4.Double 85 =
  5. 5.Double 35 =
  6. 6.Double 47 =
  7. 7.Half of 102 =
  8. 8.Double 38 =
  9. 9.Half of 72 =
  10. 10.Half of 82 =
  11. 11.Double 26 =
  12. 12.Half of 14 =
  13. 13.Double 72 =
  14. 14.Double 73 =
  15. 15.Half of 166 =
  16. 16.Double 14 =
  17. 17.Half of 92 =
  18. 18.Double 36 =
  19. 19.Double 44 =
  20. 20.Double 83 =
  21. 21.Half of 44 =
  22. 22.Double 97 =
  23. 23.Double 67 =
  24. 24.Double 91 =
  25. 25.Half of 146 =
  26. 26.Half of 62 =
  27. 27.Double 93 =
  28. 28.Half of 112 =
  29. 29.Double 79 =
  30. 30.Half of 192 =
  31. 31.Double 42 =
  32. 32.Half of 24 =
  33. 33.Double 29 =
  34. 34.Half of 32 =
  35. 35.Double 27 =
  36. 36.Half of 106 =
  37. 37.Half of 156 =
  38. 38.Double 84 =
  39. 39.Double 68 =
  40. 40.Double 71 =

Answer key

  1. 122
  2. 32
  3. 59
  4. 170
  5. 70
  6. 94
  7. 51
  8. 76
  9. 36
  10. 41
  11. 52
  12. 7
  13. 144
  14. 146
  15. 83
  16. 28
  17. 46
  18. 72
  19. 88
  20. 166
  21. 22
  22. 194
  23. 134
  24. 182
  25. 73
  26. 31
  27. 186
  28. 56
  29. 158
  30. 96
  31. 84
  32. 12
  33. 58
  34. 16
  35. 54
  36. 53
  37. 78
  38. 168
  39. 136
  40. 142

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