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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 57 · 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 82 =
  2. 2.Half of 94 =
  3. 3.Double 23 =
  4. 4.Double 29 =
  5. 5.Double 51 =
  6. 6.Half of 174 =
  7. 7.Half of 18 =
  8. 8.Double 91 =
  9. 9.Double 69 =
  10. 10.Double 96 =
  11. 11.Half of 114 =
  12. 12.Double 47 =
  13. 13.Double 35 =
  14. 14.Double 27 =
  15. 15.Double 36 =
  16. 16.Double 82 =
  17. 17.Double 71 =
  18. 18.Double 94 =
  19. 19.Half of 106 =
  20. 20.Half of 152 =
  21. 21.Double 66 =
  22. 22.Double 32 =
  23. 23.Double 59 =
  24. 24.Double 81 =
  25. 25.Half of 148 =
  26. 26.Half of 188 =
  27. 27.Half of 196 =
  28. 28.Half of 96 =
  29. 29.Half of 22 =
  30. 30.Double 44 =
  31. 31.Half of 24 =
  32. 32.Double 64 =
  33. 33.Half of 126 =
  34. 34.Double 74 =
  35. 35.Double 54 =
  36. 36.Half of 156 =
  37. 37.Double 21 =
  38. 38.Half of 162 =
  39. 39.Double 97 =
  40. 40.Double 99 =

Answer key

  1. 41
  2. 47
  3. 46
  4. 58
  5. 102
  6. 87
  7. 9
  8. 182
  9. 138
  10. 192
  11. 57
  12. 94
  13. 70
  14. 54
  15. 72
  16. 164
  17. 142
  18. 188
  19. 53
  20. 76
  21. 132
  22. 64
  23. 118
  24. 162
  25. 74
  26. 94
  27. 98
  28. 48
  29. 11
  30. 88
  31. 12
  32. 128
  33. 63
  34. 148
  35. 108
  36. 78
  37. 42
  38. 81
  39. 194
  40. 198

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