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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 960 · 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 76 =
  2. 2.Double 41 =
  3. 3.Double 69 =
  4. 4.Double 31 =
  5. 5.Half of 32 =
  6. 6.Double 51 =
  7. 7.Half of 62 =
  8. 8.Half of 54 =
  9. 9.Double 35 =
  10. 10.Half of 188 =
  11. 11.Half of 174 =
  12. 12.Double 39 =
  13. 13.Half of 192 =
  14. 14.Double 57 =
  15. 15.Half of 136 =
  16. 16.Double 85 =
  17. 17.Half of 184 =
  18. 18.Double 12 =
  19. 19.Half of 172 =
  20. 20.Double 21 =
  21. 21.Double 13 =
  22. 22.Half of 146 =
  23. 23.Half of 134 =
  24. 24.Double 73 =
  25. 25.Half of 58 =
  26. 26.Double 59 =
  27. 27.Half of 72 =
  28. 28.Half of 42 =
  29. 29.Double 99 =
  30. 30.Double 53 =
  31. 31.Double 55 =
  32. 32.Double 18 =
  33. 33.Half of 44 =
  34. 34.Double 83 =
  35. 35.Double 17 =
  36. 36.Double 29 =
  37. 37.Half of 102 =
  38. 38.Double 22 =
  39. 39.Double 33 =
  40. 40.Double 67 =

Answer key

  1. 152
  2. 82
  3. 138
  4. 62
  5. 16
  6. 102
  7. 31
  8. 27
  9. 70
  10. 94
  11. 87
  12. 78
  13. 96
  14. 114
  15. 68
  16. 170
  17. 92
  18. 24
  19. 86
  20. 42
  21. 26
  22. 73
  23. 67
  24. 146
  25. 29
  26. 118
  27. 36
  28. 21
  29. 198
  30. 106
  31. 110
  32. 36
  33. 22
  34. 166
  35. 34
  36. 58
  37. 51
  38. 44
  39. 66
  40. 134

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