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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 711 · 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 136 =
  2. 2.Double 25 =
  3. 3.Half of 152 =
  4. 4.Double 22 =
  5. 5.Half of 166 =
  6. 6.Double 21 =
  7. 7.Half of 102 =
  8. 8.Half of 72 =
  9. 9.Double 84 =
  10. 10.Double 23 =
  11. 11.Double 67 =
  12. 12.Half of 68 =
  13. 13.Double 81 =
  14. 14.Double 58 =
  15. 15.Double 31 =
  16. 16.Double 57 =
  17. 17.Double 86 =
  18. 18.Double 56 =
  19. 19.Half of 92 =
  20. 20.Double 69 =
  21. 21.Double 62 =
  22. 22.Double 75 =
  23. 23.Half of 138 =
  24. 24.Double 53 =
  25. 25.Double 96 =
  26. 26.Half of 108 =
  27. 27.Double 51 =
  28. 28.Double 74 =
  29. 29.Half of 22 =
  30. 30.Half of 82 =
  31. 31.Half of 182 =
  32. 32.Half of 62 =
  33. 33.Double 12 =
  34. 34.Half of 142 =
  35. 35.Double 73 =
  36. 36.Double 68 =
  37. 37.Half of 174 =
  38. 38.Double 55 =
  39. 39.Double 32 =
  40. 40.Double 98 =

Answer key

  1. 68
  2. 50
  3. 76
  4. 44
  5. 83
  6. 42
  7. 51
  8. 36
  9. 168
  10. 46
  11. 134
  12. 34
  13. 162
  14. 116
  15. 62
  16. 114
  17. 172
  18. 112
  19. 46
  20. 138
  21. 124
  22. 150
  23. 69
  24. 106
  25. 192
  26. 54
  27. 102
  28. 148
  29. 11
  30. 41
  31. 91
  32. 31
  33. 24
  34. 71
  35. 146
  36. 136
  37. 87
  38. 110
  39. 64
  40. 196

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