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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 10 · 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 102 =
  2. 2.Half of 62 =
  3. 3.Double 31 =
  4. 4.Double 46 =
  5. 5.Double 71 =
  6. 6.Half of 144 =
  7. 7.Double 26 =
  8. 8.Double 91 =
  9. 9.Half of 198 =
  10. 10.Double 45 =
  11. 11.Double 52 =
  12. 12.Double 54 =
  13. 13.Double 11 =
  14. 14.Half of 164 =
  15. 15.Half of 142 =
  16. 16.Double 94 =
  17. 17.Double 69 =
  18. 18.Half of 22 =
  19. 19.Half of 34 =
  20. 20.Double 74 =
  21. 21.Half of 24 =
  22. 22.Half of 82 =
  23. 23.Half of 122 =
  24. 24.Double 99 =
  25. 25.Half of 42 =
  26. 26.Half of 46 =
  27. 27.Double 61 =
  28. 28.Double 83 =
  29. 29.Half of 118 =
  30. 30.Half of 186 =
  31. 31.Half of 148 =
  32. 32.Double 93 =
  33. 33.Double 57 =
  34. 34.Double 42 =
  35. 35.Half of 124 =
  36. 36.Half of 176 =
  37. 37.Double 87 =
  38. 38.Half of 132 =
  39. 39.Double 21 =
  40. 40.Half of 126 =

Answer key

  1. 51
  2. 31
  3. 62
  4. 92
  5. 142
  6. 72
  7. 52
  8. 182
  9. 99
  10. 90
  11. 104
  12. 108
  13. 22
  14. 82
  15. 71
  16. 188
  17. 138
  18. 11
  19. 17
  20. 148
  21. 12
  22. 41
  23. 61
  24. 198
  25. 21
  26. 23
  27. 122
  28. 166
  29. 59
  30. 93
  31. 74
  32. 186
  33. 114
  34. 84
  35. 62
  36. 88
  37. 174
  38. 66
  39. 42
  40. 63

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