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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 828 · 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 55 =
  2. 2.Double 22 =
  3. 3.Double 36 =
  4. 4.Half of 22 =
  5. 5.Half of 198 =
  6. 6.Half of 14 =
  7. 7.Double 63 =
  8. 8.Half of 58 =
  9. 9.Half of 174 =
  10. 10.Half of 42 =
  11. 11.Double 84 =
  12. 12.Double 61 =
  13. 13.Double 57 =
  14. 14.Half of 112 =
  15. 15.Half of 64 =
  16. 16.Half of 98 =
  17. 17.Double 31 =
  18. 18.Half of 106 =
  19. 19.Half of 132 =
  20. 20.Half of 126 =
  21. 21.Half of 184 =
  22. 22.Double 34 =
  23. 23.Half of 146 =
  24. 24.Half of 92 =
  25. 25.Double 51 =
  26. 26.Half of 94 =
  27. 27.Double 45 =
  28. 28.Half of 36 =
  29. 29.Double 15 =
  30. 30.Double 21 =
  31. 31.Half of 142 =
  32. 32.Half of 48 =
  33. 33.Half of 196 =
  34. 34.Double 37 =
  35. 35.Half of 84 =
  36. 36.Half of 114 =
  37. 37.Double 39 =
  38. 38.Double 46 =
  39. 39.Half of 182 =
  40. 40.Half of 52 =

Answer key

  1. 110
  2. 44
  3. 72
  4. 11
  5. 99
  6. 7
  7. 126
  8. 29
  9. 87
  10. 21
  11. 168
  12. 122
  13. 114
  14. 56
  15. 32
  16. 49
  17. 62
  18. 53
  19. 66
  20. 63
  21. 92
  22. 68
  23. 73
  24. 46
  25. 102
  26. 47
  27. 90
  28. 18
  29. 30
  30. 42
  31. 71
  32. 24
  33. 98
  34. 74
  35. 42
  36. 57
  37. 78
  38. 92
  39. 91
  40. 26

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