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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 949 · 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 132 =
  2. 2.Double 38 =
  3. 3.Double 99 =
  4. 4.Half of 28 =
  5. 5.Double 54 =
  6. 6.Double 82 =
  7. 7.Double 62 =
  8. 8.Half of 178 =
  9. 9.Double 23 =
  10. 10.Double 85 =
  11. 11.Half of 122 =
  12. 12.Double 65 =
  13. 13.Double 76 =
  14. 14.Half of 42 =
  15. 15.Double 51 =
  16. 16.Double 87 =
  17. 17.Half of 102 =
  18. 18.Double 46 =
  19. 19.Double 83 =
  20. 20.Double 72 =
  21. 21.Double 21 =
  22. 22.Half of 198 =
  23. 23.Half of 114 =
  24. 24.Double 25 =
  25. 25.Half of 104 =
  26. 26.Double 96 =
  27. 27.Double 95 =
  28. 28.Half of 172 =
  29. 29.Half of 184 =
  30. 30.Double 41 =
  31. 31.Double 27 =
  32. 32.Half of 22 =
  33. 33.Half of 54 =
  34. 34.Double 35 =
  35. 35.Half of 188 =
  36. 36.Half of 44 =
  37. 37.Double 28 =
  38. 38.Half of 34 =
  39. 39.Half of 88 =
  40. 40.Half of 52 =

Answer key

  1. 66
  2. 76
  3. 198
  4. 14
  5. 108
  6. 164
  7. 124
  8. 89
  9. 46
  10. 170
  11. 61
  12. 130
  13. 152
  14. 21
  15. 102
  16. 174
  17. 51
  18. 92
  19. 166
  20. 144
  21. 42
  22. 99
  23. 57
  24. 50
  25. 52
  26. 192
  27. 190
  28. 86
  29. 92
  30. 82
  31. 54
  32. 11
  33. 27
  34. 70
  35. 94
  36. 22
  37. 56
  38. 17
  39. 44
  40. 26

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