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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 981 · 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 38 =
  2. 2.Half of 104 =
  3. 3.Half of 138 =
  4. 4.Half of 146 =
  5. 5.Double 47 =
  6. 6.Half of 78 =
  7. 7.Double 99 =
  8. 8.Half of 24 =
  9. 9.Half of 28 =
  10. 10.Half of 134 =
  11. 11.Half of 22 =
  12. 12.Half of 82 =
  13. 13.Half of 182 =
  14. 14.Double 57 =
  15. 15.Half of 196 =
  16. 16.Double 45 =
  17. 17.Double 31 =
  18. 18.Half of 158 =
  19. 19.Half of 186 =
  20. 20.Double 36 =
  21. 21.Half of 142 =
  22. 22.Half of 32 =
  23. 23.Double 84 =
  24. 24.Half of 172 =
  25. 25.Double 89 =
  26. 26.Half of 162 =
  27. 27.Half of 118 =
  28. 28.Double 81 =
  29. 29.Double 76 =
  30. 30.Half of 92 =
  31. 31.Half of 132 =
  32. 32.Half of 18 =
  33. 33.Double 15 =
  34. 34.Half of 164 =
  35. 35.Double 24 =
  36. 36.Double 67 =
  37. 37.Half of 44 =
  38. 38.Half of 12 =
  39. 39.Double 55 =
  40. 40.Double 91 =

Answer key

  1. 76
  2. 52
  3. 69
  4. 73
  5. 94
  6. 39
  7. 198
  8. 12
  9. 14
  10. 67
  11. 11
  12. 41
  13. 91
  14. 114
  15. 98
  16. 90
  17. 62
  18. 79
  19. 93
  20. 72
  21. 71
  22. 16
  23. 168
  24. 86
  25. 178
  26. 81
  27. 59
  28. 162
  29. 152
  30. 46
  31. 66
  32. 9
  33. 30
  34. 82
  35. 48
  36. 134
  37. 22
  38. 6
  39. 110
  40. 182

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