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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 235 · 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 81 =
  2. 2.Double 87 =
  3. 3.Half of 34 =
  4. 4.Double 91 =
  5. 5.Half of 42 =
  6. 6.Half of 152 =
  7. 7.Half of 132 =
  8. 8.Double 67 =
  9. 9.Double 47 =
  10. 10.Half of 16 =
  11. 11.Half of 172 =
  12. 12.Double 28 =
  13. 13.Double 41 =
  14. 14.Half of 102 =
  15. 15.Double 58 =
  16. 16.Half of 12 =
  17. 17.Half of 174 =
  18. 18.Double 14 =
  19. 19.Double 15 =
  20. 20.Double 13 =
  21. 21.Double 82 =
  22. 22.Double 46 =
  23. 23.Half of 26 =
  24. 24.Double 34 =
  25. 25.Half of 72 =
  26. 26.Half of 126 =
  27. 27.Double 21 =
  28. 28.Double 32 =
  29. 29.Half of 32 =
  30. 30.Double 96 =
  31. 31.Half of 154 =
  32. 32.Half of 142 =
  33. 33.Half of 64 =
  34. 34.Double 97 =
  35. 35.Double 93 =
  36. 36.Double 33 =
  37. 37.Half of 188 =
  38. 38.Double 44 =
  39. 39.Double 88 =
  40. 40.Half of 136 =

Answer key

  1. 162
  2. 174
  3. 17
  4. 182
  5. 21
  6. 76
  7. 66
  8. 134
  9. 94
  10. 8
  11. 86
  12. 56
  13. 82
  14. 51
  15. 116
  16. 6
  17. 87
  18. 28
  19. 30
  20. 26
  21. 164
  22. 92
  23. 13
  24. 68
  25. 36
  26. 63
  27. 42
  28. 64
  29. 16
  30. 192
  31. 77
  32. 71
  33. 32
  34. 194
  35. 186
  36. 66
  37. 94
  38. 88
  39. 176
  40. 68

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