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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 955 · 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 102 =
  2. 2.Double 51 =
  3. 3.Half of 52 =
  4. 4.Double 56 =
  5. 5.Half of 64 =
  6. 6.Double 58 =
  7. 7.Half of 84 =
  8. 8.Half of 184 =
  9. 9.Half of 188 =
  10. 10.Half of 16 =
  11. 11.Double 13 =
  12. 12.Half of 134 =
  13. 13.Double 96 =
  14. 14.Half of 108 =
  15. 15.Half of 82 =
  16. 16.Double 73 =
  17. 17.Double 23 =
  18. 18.Double 66 =
  19. 19.Half of 76 =
  20. 20.Double 18 =
  21. 21.Double 28 =
  22. 22.Double 63 =
  23. 23.Double 21 =
  24. 24.Double 85 =
  25. 25.Double 71 =
  26. 26.Double 62 =
  27. 27.Half of 74 =
  28. 28.Double 89 =
  29. 29.Double 34 =
  30. 30.Half of 192 =
  31. 31.Double 99 =
  32. 32.Half of 46 =
  33. 33.Double 72 =
  34. 34.Double 32 =
  35. 35.Half of 152 =
  36. 36.Double 78 =
  37. 37.Half of 148 =
  38. 38.Half of 164 =
  39. 39.Double 15 =
  40. 40.Double 22 =

Answer key

  1. 51
  2. 102
  3. 26
  4. 112
  5. 32
  6. 116
  7. 42
  8. 92
  9. 94
  10. 8
  11. 26
  12. 67
  13. 192
  14. 54
  15. 41
  16. 146
  17. 46
  18. 132
  19. 38
  20. 36
  21. 56
  22. 126
  23. 42
  24. 170
  25. 142
  26. 124
  27. 37
  28. 178
  29. 68
  30. 96
  31. 198
  32. 23
  33. 144
  34. 64
  35. 76
  36. 156
  37. 74
  38. 82
  39. 30
  40. 44

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