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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 47 · 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 28 =
  2. 2.Double 12 =
  3. 3.Half of 162 =
  4. 4.Half of 108 =
  5. 5.Half of 94 =
  6. 6.Half of 62 =
  7. 7.Double 21 =
  8. 8.Double 19 =
  9. 9.Double 27 =
  10. 10.Half of 134 =
  11. 11.Double 75 =
  12. 12.Half of 82 =
  13. 13.Half of 174 =
  14. 14.Double 38 =
  15. 15.Half of 22 =
  16. 16.Half of 128 =
  17. 17.Double 72 =
  18. 18.Double 54 =
  19. 19.Half of 176 =
  20. 20.Half of 32 =
  21. 21.Half of 132 =
  22. 22.Half of 192 =
  23. 23.Half of 24 =
  24. 24.Double 35 =
  25. 25.Double 69 =
  26. 26.Double 15 =
  27. 27.Half of 44 =
  28. 28.Double 41 =
  29. 29.Half of 142 =
  30. 30.Half of 98 =
  31. 31.Double 18 =
  32. 32.Half of 52 =
  33. 33.Double 51 =
  34. 34.Double 42 =
  35. 35.Double 17 =
  36. 36.Double 89 =
  37. 37.Half of 112 =
  38. 38.Half of 46 =
  39. 39.Double 82 =
  40. 40.Half of 66 =

Answer key

  1. 56
  2. 24
  3. 81
  4. 54
  5. 47
  6. 31
  7. 42
  8. 38
  9. 54
  10. 67
  11. 150
  12. 41
  13. 87
  14. 76
  15. 11
  16. 64
  17. 144
  18. 108
  19. 88
  20. 16
  21. 66
  22. 96
  23. 12
  24. 70
  25. 138
  26. 30
  27. 22
  28. 82
  29. 71
  30. 49
  31. 36
  32. 26
  33. 102
  34. 84
  35. 34
  36. 178
  37. 56
  38. 23
  39. 164
  40. 33

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