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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 741 · 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 18 =
  2. 2.Double 35 =
  3. 3.Double 31 =
  4. 4.Half of 182 =
  5. 5.Half of 34 =
  6. 6.Double 29 =
  7. 7.Double 13 =
  8. 8.Double 52 =
  9. 9.Double 14 =
  10. 10.Half of 138 =
  11. 11.Half of 142 =
  12. 12.Half of 126 =
  13. 13.Double 51 =
  14. 14.Double 58 =
  15. 15.Double 21 =
  16. 16.Half of 76 =
  17. 17.Half of 62 =
  18. 18.Double 81 =
  19. 19.Half of 92 =
  20. 20.Double 82 =
  21. 21.Double 44 =
  22. 22.Half of 52 =
  23. 23.Half of 104 =
  24. 24.Double 41 =
  25. 25.Half of 12 =
  26. 26.Double 32 =
  27. 27.Double 62 =
  28. 28.Double 47 =
  29. 29.Double 39 =
  30. 30.Double 76 =
  31. 31.Half of 26 =
  32. 32.Half of 106 =
  33. 33.Half of 68 =
  34. 34.Half of 144 =
  35. 35.Half of 156 =
  36. 36.Half of 162 =
  37. 37.Double 97 =
  38. 38.Half of 112 =
  39. 39.Half of 42 =
  40. 40.Double 24 =

Answer key

  1. 9
  2. 70
  3. 62
  4. 91
  5. 17
  6. 58
  7. 26
  8. 104
  9. 28
  10. 69
  11. 71
  12. 63
  13. 102
  14. 116
  15. 42
  16. 38
  17. 31
  18. 162
  19. 46
  20. 164
  21. 88
  22. 26
  23. 52
  24. 82
  25. 6
  26. 64
  27. 124
  28. 94
  29. 78
  30. 152
  31. 13
  32. 53
  33. 34
  34. 72
  35. 78
  36. 81
  37. 194
  38. 56
  39. 21
  40. 48

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