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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 171 · 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 186 =
  2. 2.Half of 82 =
  3. 3.Half of 28 =
  4. 4.Double 63 =
  5. 5.Double 15 =
  6. 6.Double 12 =
  7. 7.Half of 36 =
  8. 8.Double 41 =
  9. 9.Half of 88 =
  10. 10.Double 19 =
  11. 11.Double 81 =
  12. 12.Half of 154 =
  13. 13.Half of 138 =
  14. 14.Half of 132 =
  15. 15.Half of 24 =
  16. 16.Double 97 =
  17. 17.Half of 104 =
  18. 18.Half of 122 =
  19. 19.Half of 18 =
  20. 20.Half of 64 =
  21. 21.Half of 124 =
  22. 22.Double 21 =
  23. 23.Double 47 =
  24. 24.Double 87 =
  25. 25.Double 34 =
  26. 26.Double 11 =
  27. 27.Half of 16 =
  28. 28.Double 64 =
  29. 29.Half of 12 =
  30. 30.Double 13 =
  31. 31.Half of 52 =
  32. 32.Double 27 =
  33. 33.Double 73 =
  34. 34.Double 26 =
  35. 35.Half of 172 =
  36. 36.Half of 174 =
  37. 37.Half of 58 =
  38. 38.Double 56 =
  39. 39.Double 98 =
  40. 40.Half of 42 =

Answer key

  1. 93
  2. 41
  3. 14
  4. 126
  5. 30
  6. 24
  7. 18
  8. 82
  9. 44
  10. 38
  11. 162
  12. 77
  13. 69
  14. 66
  15. 12
  16. 194
  17. 52
  18. 61
  19. 9
  20. 32
  21. 62
  22. 42
  23. 94
  24. 174
  25. 68
  26. 22
  27. 8
  28. 128
  29. 6
  30. 26
  31. 26
  32. 54
  33. 146
  34. 52
  35. 86
  36. 87
  37. 29
  38. 112
  39. 196
  40. 21

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