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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 49 · 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 124 =
  2. 2.Double 18 =
  3. 3.Double 33 =
  4. 4.Double 66 =
  5. 5.Double 21 =
  6. 6.Double 19 =
  7. 7.Double 65 =
  8. 8.Double 41 =
  9. 9.Double 23 =
  10. 10.Half of 106 =
  11. 11.Double 26 =
  12. 12.Double 37 =
  13. 13.Double 88 =
  14. 14.Half of 78 =
  15. 15.Double 62 =
  16. 16.Double 84 =
  17. 17.Double 17 =
  18. 18.Half of 116 =
  19. 19.Double 61 =
  20. 20.Half of 14 =
  21. 21.Double 57 =
  22. 22.Half of 112 =
  23. 23.Half of 108 =
  24. 24.Double 69 =
  25. 25.Double 94 =
  26. 26.Double 11 =
  27. 27.Double 59 =
  28. 28.Half of 96 =
  29. 29.Half of 162 =
  30. 30.Half of 184 =
  31. 31.Half of 22 =
  32. 32.Double 75 =
  33. 33.Half of 16 =
  34. 34.Half of 46 =
  35. 35.Half of 64 =
  36. 36.Double 47 =
  37. 37.Half of 194 =
  38. 38.Half of 66 =
  39. 39.Double 36 =
  40. 40.Half of 126 =

Answer key

  1. 62
  2. 36
  3. 66
  4. 132
  5. 42
  6. 38
  7. 130
  8. 82
  9. 46
  10. 53
  11. 52
  12. 74
  13. 176
  14. 39
  15. 124
  16. 168
  17. 34
  18. 58
  19. 122
  20. 7
  21. 114
  22. 56
  23. 54
  24. 138
  25. 188
  26. 22
  27. 118
  28. 48
  29. 81
  30. 92
  31. 11
  32. 150
  33. 8
  34. 23
  35. 32
  36. 94
  37. 97
  38. 33
  39. 72
  40. 63

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