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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 860 · 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 122 =
  2. 2.Double 65 =
  3. 3.Double 28 =
  4. 4.Half of 18 =
  5. 5.Double 44 =
  6. 6.Double 68 =
  7. 7.Double 24 =
  8. 8.Double 91 =
  9. 9.Half of 108 =
  10. 10.Half of 38 =
  11. 11.Half of 162 =
  12. 12.Double 11 =
  13. 13.Half of 54 =
  14. 14.Double 99 =
  15. 15.Half of 138 =
  16. 16.Double 53 =
  17. 17.Double 79 =
  18. 18.Half of 196 =
  19. 19.Half of 198 =
  20. 20.Half of 98 =
  21. 21.Double 87 =
  22. 22.Half of 42 =
  23. 23.Double 56 =
  24. 24.Double 83 =
  25. 25.Double 54 =
  26. 26.Double 35 =
  27. 27.Double 38 =
  28. 28.Double 16 =
  29. 29.Double 71 =
  30. 30.Double 72 =
  31. 31.Half of 78 =
  32. 32.Double 23 =
  33. 33.Double 62 =
  34. 34.Half of 184 =
  35. 35.Half of 96 =
  36. 36.Half of 58 =
  37. 37.Half of 154 =
  38. 38.Half of 76 =
  39. 39.Half of 46 =
  40. 40.Double 84 =

Answer key

  1. 61
  2. 130
  3. 56
  4. 9
  5. 88
  6. 136
  7. 48
  8. 182
  9. 54
  10. 19
  11. 81
  12. 22
  13. 27
  14. 198
  15. 69
  16. 106
  17. 158
  18. 98
  19. 99
  20. 49
  21. 174
  22. 21
  23. 112
  24. 166
  25. 108
  26. 70
  27. 76
  28. 32
  29. 142
  30. 144
  31. 39
  32. 46
  33. 124
  34. 92
  35. 48
  36. 29
  37. 77
  38. 38
  39. 23
  40. 168

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