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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 210 · 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 23 =
  2. 2.Half of 82 =
  3. 3.Half of 62 =
  4. 4.Half of 122 =
  5. 5.Double 71 =
  6. 6.Double 97 =
  7. 7.Double 51 =
  8. 8.Double 29 =
  9. 9.Double 98 =
  10. 10.Half of 188 =
  11. 11.Double 21 =
  12. 12.Half of 118 =
  13. 13.Double 99 =
  14. 14.Double 34 =
  15. 15.Double 77 =
  16. 16.Double 74 =
  17. 17.Half of 114 =
  18. 18.Double 72 =
  19. 19.Half of 138 =
  20. 20.Half of 168 =
  21. 21.Double 61 =
  22. 22.Double 46 =
  23. 23.Double 22 =
  24. 24.Double 25 =
  25. 25.Half of 146 =
  26. 26.Double 53 =
  27. 27.Double 68 =
  28. 28.Half of 162 =
  29. 29.Double 87 =
  30. 30.Double 42 =
  31. 31.Half of 134 =
  32. 32.Double 75 =
  33. 33.Double 86 =
  34. 34.Double 15 =
  35. 35.Half of 48 =
  36. 36.Double 78 =
  37. 37.Half of 44 =
  38. 38.Half of 182 =
  39. 39.Double 31 =
  40. 40.Double 11 =

Answer key

  1. 46
  2. 41
  3. 31
  4. 61
  5. 142
  6. 194
  7. 102
  8. 58
  9. 196
  10. 94
  11. 42
  12. 59
  13. 198
  14. 68
  15. 154
  16. 148
  17. 57
  18. 144
  19. 69
  20. 84
  21. 122
  22. 92
  23. 44
  24. 50
  25. 73
  26. 106
  27. 136
  28. 81
  29. 174
  30. 84
  31. 67
  32. 150
  33. 172
  34. 30
  35. 24
  36. 156
  37. 22
  38. 91
  39. 62
  40. 22

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