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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 931 · 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 24 =
  2. 2.Double 11 =
  3. 3.Double 21 =
  4. 4.Double 61 =
  5. 5.Double 32 =
  6. 6.Half of 192 =
  7. 7.Half of 18 =
  8. 8.Half of 62 =
  9. 9.Half of 74 =
  10. 10.Half of 146 =
  11. 11.Half of 102 =
  12. 12.Double 23 =
  13. 13.Double 41 =
  14. 14.Double 87 =
  15. 15.Double 36 =
  16. 16.Half of 112 =
  17. 17.Half of 162 =
  18. 18.Double 93 =
  19. 19.Half of 22 =
  20. 20.Double 96 =
  21. 21.Half of 122 =
  22. 22.Double 51 =
  23. 23.Double 19 =
  24. 24.Double 64 =
  25. 25.Half of 186 =
  26. 26.Double 47 =
  27. 27.Double 85 =
  28. 28.Double 55 =
  29. 29.Double 31 =
  30. 30.Double 66 =
  31. 31.Half of 88 =
  32. 32.Half of 132 =
  33. 33.Half of 116 =
  34. 34.Half of 196 =
  35. 35.Double 81 =
  36. 36.Double 71 =
  37. 37.Half of 92 =
  38. 38.Half of 174 =
  39. 39.Double 72 =
  40. 40.Double 84 =

Answer key

  1. 12
  2. 22
  3. 42
  4. 122
  5. 64
  6. 96
  7. 9
  8. 31
  9. 37
  10. 73
  11. 51
  12. 46
  13. 82
  14. 174
  15. 72
  16. 56
  17. 81
  18. 186
  19. 11
  20. 192
  21. 61
  22. 102
  23. 38
  24. 128
  25. 93
  26. 94
  27. 170
  28. 110
  29. 62
  30. 132
  31. 44
  32. 66
  33. 58
  34. 98
  35. 162
  36. 142
  37. 46
  38. 87
  39. 144
  40. 168

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