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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 863 · 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 48 =
  2. 2.Half of 136 =
  3. 3.Double 83 =
  4. 4.Double 21 =
  5. 5.Double 61 =
  6. 6.Half of 162 =
  7. 7.Half of 92 =
  8. 8.Double 36 =
  9. 9.Double 77 =
  10. 10.Double 49 =
  11. 11.Half of 54 =
  12. 12.Double 76 =
  13. 13.Double 63 =
  14. 14.Double 31 =
  15. 15.Half of 146 =
  16. 16.Double 16 =
  17. 17.Half of 116 =
  18. 18.Double 29 =
  19. 19.Half of 22 =
  20. 20.Double 78 =
  21. 21.Half of 62 =
  22. 22.Double 82 =
  23. 23.Double 38 =
  24. 24.Double 65 =
  25. 25.Double 22 =
  26. 26.Half of 188 =
  27. 27.Double 85 =
  28. 28.Half of 134 =
  29. 29.Half of 32 =
  30. 30.Double 94 =
  31. 31.Half of 194 =
  32. 32.Half of 166 =
  33. 33.Double 68 =
  34. 34.Double 53 =
  35. 35.Double 95 =
  36. 36.Half of 12 =
  37. 37.Double 43 =
  38. 38.Half of 64 =
  39. 39.Half of 74 =
  40. 40.Half of 104 =

Answer key

  1. 96
  2. 68
  3. 166
  4. 42
  5. 122
  6. 81
  7. 46
  8. 72
  9. 154
  10. 98
  11. 27
  12. 152
  13. 126
  14. 62
  15. 73
  16. 32
  17. 58
  18. 58
  19. 11
  20. 156
  21. 31
  22. 164
  23. 76
  24. 130
  25. 44
  26. 94
  27. 170
  28. 67
  29. 16
  30. 188
  31. 97
  32. 83
  33. 136
  34. 106
  35. 190
  36. 6
  37. 86
  38. 32
  39. 37
  40. 52

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