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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 14 · 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 84 =
  2. 2.Half of 122 =
  3. 3.Double 22 =
  4. 4.Double 75 =
  5. 5.Half of 82 =
  6. 6.Double 51 =
  7. 7.Double 45 =
  8. 8.Double 48 =
  9. 9.Half of 26 =
  10. 10.Half of 84 =
  11. 11.Double 28 =
  12. 12.Half of 128 =
  13. 13.Half of 162 =
  14. 14.Half of 34 =
  15. 15.Half of 138 =
  16. 16.Double 65 =
  17. 17.Half of 112 =
  18. 18.Double 55 =
  19. 19.Half of 172 =
  20. 20.Half of 22 =
  21. 21.Double 57 =
  22. 22.Double 72 =
  23. 23.Double 31 =
  24. 24.Half of 16 =
  25. 25.Double 15 =
  26. 26.Double 46 =
  27. 27.Half of 182 =
  28. 28.Double 32 =
  29. 29.Double 61 =
  30. 30.Half of 24 =
  31. 31.Half of 102 =
  32. 32.Half of 76 =
  33. 33.Half of 52 =
  34. 34.Double 64 =
  35. 35.Half of 92 =
  36. 36.Double 58 =
  37. 37.Double 69 =
  38. 38.Double 35 =
  39. 39.Half of 168 =
  40. 40.Half of 36 =

Answer key

  1. 168
  2. 61
  3. 44
  4. 150
  5. 41
  6. 102
  7. 90
  8. 96
  9. 13
  10. 42
  11. 56
  12. 64
  13. 81
  14. 17
  15. 69
  16. 130
  17. 56
  18. 110
  19. 86
  20. 11
  21. 114
  22. 144
  23. 62
  24. 8
  25. 30
  26. 92
  27. 91
  28. 64
  29. 122
  30. 12
  31. 51
  32. 38
  33. 26
  34. 128
  35. 46
  36. 116
  37. 138
  38. 70
  39. 84
  40. 18

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