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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 998 · 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 99 =
  2. 2.Double 51 =
  3. 3.Half of 56 =
  4. 4.Half of 96 =
  5. 5.Double 81 =
  6. 6.Half of 84 =
  7. 7.Half of 142 =
  8. 8.Half of 172 =
  9. 9.Double 13 =
  10. 10.Half of 184 =
  11. 11.Double 96 =
  12. 12.Half of 198 =
  13. 13.Half of 174 =
  14. 14.Double 43 =
  15. 15.Half of 192 =
  16. 16.Half of 82 =
  17. 17.Double 52 =
  18. 18.Half of 52 =
  19. 19.Double 64 =
  20. 20.Half of 54 =
  21. 21.Half of 126 =
  22. 22.Half of 18 =
  23. 23.Half of 22 =
  24. 24.Half of 62 =
  25. 25.Half of 114 =
  26. 26.Double 48 =
  27. 27.Double 82 =
  28. 28.Half of 64 =
  29. 29.Half of 58 =
  30. 30.Double 78 =
  31. 31.Double 67 =
  32. 32.Half of 116 =
  33. 33.Half of 112 =
  34. 34.Half of 74 =
  35. 35.Double 27 =
  36. 36.Half of 38 =
  37. 37.Double 91 =
  38. 38.Double 31 =
  39. 39.Half of 194 =
  40. 40.Half of 162 =

Answer key

  1. 198
  2. 102
  3. 28
  4. 48
  5. 162
  6. 42
  7. 71
  8. 86
  9. 26
  10. 92
  11. 192
  12. 99
  13. 87
  14. 86
  15. 96
  16. 41
  17. 104
  18. 26
  19. 128
  20. 27
  21. 63
  22. 9
  23. 11
  24. 31
  25. 57
  26. 96
  27. 164
  28. 32
  29. 29
  30. 156
  31. 134
  32. 58
  33. 56
  34. 37
  35. 54
  36. 19
  37. 182
  38. 62
  39. 97
  40. 81

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