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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 865 · 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 77 =
  2. 2.Half of 14 =
  3. 3.Double 92 =
  4. 4.Half of 196 =
  5. 5.Double 49 =
  6. 6.Half of 72 =
  7. 7.Double 71 =
  8. 8.Double 21 =
  9. 9.Half of 142 =
  10. 10.Double 32 =
  11. 11.Double 66 =
  12. 12.Double 95 =
  13. 13.Double 45 =
  14. 14.Double 33 =
  15. 15.Half of 22 =
  16. 16.Double 47 =
  17. 17.Double 51 =
  18. 18.Half of 132 =
  19. 19.Double 41 =
  20. 20.Half of 164 =
  21. 21.Double 53 =
  22. 22.Double 79 =
  23. 23.Double 81 =
  24. 24.Double 64 =
  25. 25.Half of 178 =
  26. 26.Double 94 =
  27. 27.Double 83 =
  28. 28.Double 31 =
  29. 29.Double 11 =
  30. 30.Half of 104 =
  31. 31.Half of 92 =
  32. 32.Double 13 =
  33. 33.Double 48 =
  34. 34.Half of 122 =
  35. 35.Half of 54 =
  36. 36.Double 68 =
  37. 37.Double 56 =
  38. 38.Half of 48 =
  39. 39.Half of 182 =
  40. 40.Half of 172 =

Answer key

  1. 154
  2. 7
  3. 184
  4. 98
  5. 98
  6. 36
  7. 142
  8. 42
  9. 71
  10. 64
  11. 132
  12. 190
  13. 90
  14. 66
  15. 11
  16. 94
  17. 102
  18. 66
  19. 82
  20. 82
  21. 106
  22. 158
  23. 162
  24. 128
  25. 89
  26. 188
  27. 166
  28. 62
  29. 22
  30. 52
  31. 46
  32. 26
  33. 96
  34. 61
  35. 27
  36. 136
  37. 112
  38. 24
  39. 91
  40. 86

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