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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 122 · 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 64 =
  2. 2.Double 25 =
  3. 3.Half of 66 =
  4. 4.Half of 72 =
  5. 5.Double 65 =
  6. 6.Double 27 =
  7. 7.Double 56 =
  8. 8.Half of 56 =
  9. 9.Half of 12 =
  10. 10.Half of 134 =
  11. 11.Double 49 =
  12. 12.Half of 136 =
  13. 13.Double 54 =
  14. 14.Half of 32 =
  15. 15.Double 42 =
  16. 16.Double 43 =
  17. 17.Double 33 =
  18. 18.Half of 48 =
  19. 19.Half of 82 =
  20. 20.Double 22 =
  21. 21.Double 92 =
  22. 22.Half of 62 =
  23. 23.Double 31 =
  24. 24.Half of 198 =
  25. 25.Double 89 =
  26. 26.Double 79 =
  27. 27.Half of 142 =
  28. 28.Half of 52 =
  29. 29.Double 95 =
  30. 30.Double 15 =
  31. 31.Half of 172 =
  32. 32.Double 16 =
  33. 33.Double 87 =
  34. 34.Double 17 =
  35. 35.Double 32 =
  36. 36.Half of 84 =
  37. 37.Double 61 =
  38. 38.Half of 122 =
  39. 39.Double 46 =
  40. 40.Half of 132 =

Answer key

  1. 32
  2. 50
  3. 33
  4. 36
  5. 130
  6. 54
  7. 112
  8. 28
  9. 6
  10. 67
  11. 98
  12. 68
  13. 108
  14. 16
  15. 84
  16. 86
  17. 66
  18. 24
  19. 41
  20. 44
  21. 184
  22. 31
  23. 62
  24. 99
  25. 178
  26. 158
  27. 71
  28. 26
  29. 190
  30. 30
  31. 86
  32. 32
  33. 174
  34. 34
  35. 64
  36. 42
  37. 122
  38. 61
  39. 92
  40. 66

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