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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 763 · 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 16 =
  2. 2.Double 82 =
  3. 3.Half of 18 =
  4. 4.Half of 172 =
  5. 5.Half of 46 =
  6. 6.Half of 92 =
  7. 7.Double 63 =
  8. 8.Double 41 =
  9. 9.Half of 148 =
  10. 10.Half of 192 =
  11. 11.Double 17 =
  12. 12.Double 31 =
  13. 13.Double 21 =
  14. 14.Half of 124 =
  15. 15.Half of 102 =
  16. 16.Double 75 =
  17. 17.Double 32 =
  18. 18.Half of 64 =
  19. 19.Double 81 =
  20. 20.Double 87 =
  21. 21.Double 19 =
  22. 22.Double 47 =
  23. 23.Half of 58 =
  24. 24.Half of 138 =
  25. 25.Double 33 =
  26. 26.Half of 132 =
  27. 27.Double 88 =
  28. 28.Double 25 =
  29. 29.Half of 62 =
  30. 30.Double 22 =
  31. 31.Double 14 =
  32. 32.Double 48 =
  33. 33.Double 15 =
  34. 34.Double 71 =
  35. 35.Half of 156 =
  36. 36.Double 69 =
  37. 37.Half of 118 =
  38. 38.Double 42 =
  39. 39.Double 12 =
  40. 40.Half of 48 =

Answer key

  1. 32
  2. 164
  3. 9
  4. 86
  5. 23
  6. 46
  7. 126
  8. 82
  9. 74
  10. 96
  11. 34
  12. 62
  13. 42
  14. 62
  15. 51
  16. 150
  17. 64
  18. 32
  19. 162
  20. 174
  21. 38
  22. 94
  23. 29
  24. 69
  25. 66
  26. 66
  27. 176
  28. 50
  29. 31
  30. 44
  31. 28
  32. 96
  33. 30
  34. 142
  35. 78
  36. 138
  37. 59
  38. 84
  39. 24
  40. 24

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