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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 349 · 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 91 =
  2. 2.Double 44 =
  3. 3.Half of 146 =
  4. 4.Double 31 =
  5. 5.Half of 122 =
  6. 6.Half of 72 =
  7. 7.Half of 162 =
  8. 8.Double 71 =
  9. 9.Half of 148 =
  10. 10.Half of 22 =
  11. 11.Double 69 =
  12. 12.Half of 32 =
  13. 13.Half of 54 =
  14. 14.Half of 44 =
  15. 15.Double 19 =
  16. 16.Half of 102 =
  17. 17.Double 38 =
  18. 18.Half of 168 =
  19. 19.Half of 164 =
  20. 20.Half of 186 =
  21. 21.Double 51 =
  22. 22.Double 89 =
  23. 23.Double 98 =
  24. 24.Half of 12 =
  25. 25.Double 56 =
  26. 26.Half of 74 =
  27. 27.Half of 188 =
  28. 28.Half of 26 =
  29. 29.Double 96 =
  30. 30.Half of 64 =
  31. 31.Half of 114 =
  32. 32.Double 21 =
  33. 33.Double 67 =
  34. 34.Half of 18 =
  35. 35.Double 34 =
  36. 36.Double 99 =
  37. 37.Half of 16 =
  38. 38.Double 66 =
  39. 39.Double 85 =
  40. 40.Double 45 =

Answer key

  1. 182
  2. 88
  3. 73
  4. 62
  5. 61
  6. 36
  7. 81
  8. 142
  9. 74
  10. 11
  11. 138
  12. 16
  13. 27
  14. 22
  15. 38
  16. 51
  17. 76
  18. 84
  19. 82
  20. 93
  21. 102
  22. 178
  23. 196
  24. 6
  25. 112
  26. 37
  27. 94
  28. 13
  29. 192
  30. 32
  31. 57
  32. 42
  33. 134
  34. 9
  35. 68
  36. 198
  37. 8
  38. 132
  39. 170
  40. 90

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