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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 94 · 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 73 =
  2. 2.Half of 18 =
  3. 3.Double 68 =
  4. 4.Double 74 =
  5. 5.Double 11 =
  6. 6.Half of 118 =
  7. 7.Half of 102 =
  8. 8.Double 77 =
  9. 9.Double 48 =
  10. 10.Half of 148 =
  11. 11.Half of 158 =
  12. 12.Half of 22 =
  13. 13.Double 38 =
  14. 14.Half of 112 =
  15. 15.Double 67 =
  16. 16.Double 96 =
  17. 17.Half of 78 =
  18. 18.Half of 106 =
  19. 19.Double 16 =
  20. 20.Half of 162 =
  21. 21.Half of 34 =
  22. 22.Half of 24 =
  23. 23.Half of 126 =
  24. 24.Double 75 =
  25. 25.Double 35 =
  26. 26.Double 34 =
  27. 27.Double 31 =
  28. 28.Half of 164 =
  29. 29.Half of 138 =
  30. 30.Double 76 =
  31. 31.Double 81 =
  32. 32.Double 13 =
  33. 33.Double 26 =
  34. 34.Half of 44 =
  35. 35.Half of 174 =
  36. 36.Half of 104 =
  37. 37.Double 17 =
  38. 38.Double 95 =
  39. 39.Half of 82 =
  40. 40.Double 22 =

Answer key

  1. 146
  2. 9
  3. 136
  4. 148
  5. 22
  6. 59
  7. 51
  8. 154
  9. 96
  10. 74
  11. 79
  12. 11
  13. 76
  14. 56
  15. 134
  16. 192
  17. 39
  18. 53
  19. 32
  20. 81
  21. 17
  22. 12
  23. 63
  24. 150
  25. 70
  26. 68
  27. 62
  28. 82
  29. 69
  30. 152
  31. 162
  32. 26
  33. 52
  34. 22
  35. 87
  36. 52
  37. 34
  38. 190
  39. 41
  40. 44

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