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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 892 · 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.Half of 114 =
  2. 2.Half of 54 =
  3. 3.Half of 166 =
  4. 4.Double 95 =
  5. 5.Half of 116 =
  6. 6.Half of 168 =
  7. 7.Half of 82 =
  8. 8.Half of 32 =
  9. 9.Double 44 =
  10. 10.Half of 142 =
  11. 11.Half of 188 =
  12. 12.Half of 108 =
  13. 13.Half of 172 =
  14. 14.Double 31 =
  15. 15.Half of 176 =
  16. 16.Double 77 =
  17. 17.Double 29 =
  18. 18.Double 86 =
  19. 19.Double 16 =
  20. 20.Double 11 =
  21. 21.Half of 138 =
  22. 22.Half of 88 =
  23. 23.Half of 186 =
  24. 24.Half of 124 =
  25. 25.Double 92 =
  26. 26.Half of 38 =
  27. 27.Double 89 =
  28. 28.Half of 62 =
  29. 29.Double 81 =
  30. 30.Half of 42 =
  31. 31.Half of 162 =
  32. 32.Double 39 =
  33. 33.Double 25 =
  34. 34.Half of 72 =
  35. 35.Double 47 =
  36. 36.Half of 34 =
  37. 37.Double 75 =
  38. 38.Double 83 =
  39. 39.Double 28 =
  40. 40.Double 14 =

Answer key

  1. 57
  2. 27
  3. 83
  4. 190
  5. 58
  6. 84
  7. 41
  8. 16
  9. 88
  10. 71
  11. 94
  12. 54
  13. 86
  14. 62
  15. 88
  16. 154
  17. 58
  18. 172
  19. 32
  20. 22
  21. 69
  22. 44
  23. 93
  24. 62
  25. 184
  26. 19
  27. 178
  28. 31
  29. 162
  30. 21
  31. 81
  32. 78
  33. 50
  34. 36
  35. 94
  36. 17
  37. 150
  38. 166
  39. 56
  40. 28

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