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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 549 · 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.Double 99 =
  2. 2.Half of 142 =
  3. 3.Half of 146 =
  4. 4.Half of 32 =
  5. 5.Double 68 =
  6. 6.Double 47 =
  7. 7.Half of 148 =
  8. 8.Double 89 =
  9. 9.Double 49 =
  10. 10.Half of 54 =
  11. 11.Double 53 =
  12. 12.Double 61 =
  13. 13.Half of 164 =
  14. 14.Double 71 =
  15. 15.Double 39 =
  16. 16.Half of 56 =
  17. 17.Double 87 =
  18. 18.Half of 78 =
  19. 19.Half of 132 =
  20. 20.Double 57 =
  21. 21.Double 63 =
  22. 22.Half of 42 =
  23. 23.Double 19 =
  24. 24.Half of 28 =
  25. 25.Half of 166 =
  26. 26.Double 25 =
  27. 27.Half of 172 =
  28. 28.Double 83 =
  29. 29.Double 32 =
  30. 30.Half of 26 =
  31. 31.Double 52 =
  32. 32.Half of 88 =
  33. 33.Half of 134 =
  34. 34.Double 55 =
  35. 35.Double 31 =
  36. 36.Half of 96 =
  37. 37.Half of 82 =
  38. 38.Half of 22 =
  39. 39.Double 96 =
  40. 40.Double 59 =

Answer key

  1. 198
  2. 71
  3. 73
  4. 16
  5. 136
  6. 94
  7. 74
  8. 178
  9. 98
  10. 27
  11. 106
  12. 122
  13. 82
  14. 142
  15. 78
  16. 28
  17. 174
  18. 39
  19. 66
  20. 114
  21. 126
  22. 21
  23. 38
  24. 14
  25. 83
  26. 50
  27. 86
  28. 166
  29. 64
  30. 13
  31. 104
  32. 44
  33. 67
  34. 110
  35. 62
  36. 48
  37. 41
  38. 11
  39. 192
  40. 118

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