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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 889 · 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 52 =
  2. 2.Double 12 =
  3. 3.Half of 66 =
  4. 4.Half of 22 =
  5. 5.Half of 24 =
  6. 6.Double 28 =
  7. 7.Double 69 =
  8. 8.Double 35 =
  9. 9.Double 33 =
  10. 10.Double 46 =
  11. 11.Half of 108 =
  12. 12.Double 26 =
  13. 13.Half of 32 =
  14. 14.Double 86 =
  15. 15.Half of 12 =
  16. 16.Half of 154 =
  17. 17.Double 13 =
  18. 18.Double 71 =
  19. 19.Double 32 =
  20. 20.Double 36 =
  21. 21.Double 58 =
  22. 22.Double 29 =
  23. 23.Double 94 =
  24. 24.Double 97 =
  25. 25.Half of 52 =
  26. 26.Half of 82 =
  27. 27.Double 73 =
  28. 28.Double 14 =
  29. 29.Half of 146 =
  30. 30.Half of 76 =
  31. 31.Double 53 =
  32. 32.Double 96 =
  33. 33.Double 31 =
  34. 34.Half of 192 =
  35. 35.Half of 46 =
  36. 36.Half of 74 =
  37. 37.Double 98 =
  38. 38.Half of 54 =
  39. 39.Double 75 =
  40. 40.Double 99 =

Answer key

  1. 104
  2. 24
  3. 33
  4. 11
  5. 12
  6. 56
  7. 138
  8. 70
  9. 66
  10. 92
  11. 54
  12. 52
  13. 16
  14. 172
  15. 6
  16. 77
  17. 26
  18. 142
  19. 64
  20. 72
  21. 116
  22. 58
  23. 188
  24. 194
  25. 26
  26. 41
  27. 146
  28. 28
  29. 73
  30. 38
  31. 106
  32. 192
  33. 62
  34. 96
  35. 23
  36. 37
  37. 196
  38. 27
  39. 150
  40. 198

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