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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 555 · 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 162 =
  2. 2.Double 36 =
  3. 3.Double 73 =
  4. 4.Double 54 =
  5. 5.Double 64 =
  6. 6.Half of 32 =
  7. 7.Double 12 =
  8. 8.Half of 74 =
  9. 9.Double 61 =
  10. 10.Double 17 =
  11. 11.Double 99 =
  12. 12.Double 52 =
  13. 13.Half of 44 =
  14. 14.Double 48 =
  15. 15.Half of 76 =
  16. 16.Half of 118 =
  17. 17.Double 92 =
  18. 18.Double 87 =
  19. 19.Half of 88 =
  20. 20.Double 44 =
  21. 21.Double 74 =
  22. 22.Half of 198 =
  23. 23.Half of 62 =
  24. 24.Half of 96 =
  25. 25.Half of 92 =
  26. 26.Half of 174 =
  27. 27.Double 45 =
  28. 28.Double 31 =
  29. 29.Double 11 =
  30. 30.Double 37 =
  31. 31.Double 65 =
  32. 32.Half of 142 =
  33. 33.Double 85 =
  34. 34.Half of 196 =
  35. 35.Half of 36 =
  36. 36.Half of 184 =
  37. 37.Half of 136 =
  38. 38.Half of 122 =
  39. 39.Double 82 =
  40. 40.Double 62 =

Answer key

  1. 81
  2. 72
  3. 146
  4. 108
  5. 128
  6. 16
  7. 24
  8. 37
  9. 122
  10. 34
  11. 198
  12. 104
  13. 22
  14. 96
  15. 38
  16. 59
  17. 184
  18. 174
  19. 44
  20. 88
  21. 148
  22. 99
  23. 31
  24. 48
  25. 46
  26. 87
  27. 90
  28. 62
  29. 22
  30. 74
  31. 130
  32. 71
  33. 170
  34. 98
  35. 18
  36. 92
  37. 68
  38. 61
  39. 164
  40. 124

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