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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 789 · 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 102 =
  2. 2.Half of 72 =
  3. 3.Double 55 =
  4. 4.Half of 66 =
  5. 5.Half of 192 =
  6. 6.Double 51 =
  7. 7.Double 13 =
  8. 8.Double 64 =
  9. 9.Half of 88 =
  10. 10.Half of 26 =
  11. 11.Double 86 =
  12. 12.Double 27 =
  13. 13.Half of 142 =
  14. 14.Double 65 =
  15. 15.Half of 56 =
  16. 16.Half of 38 =
  17. 17.Half of 64 =
  18. 18.Half of 74 =
  19. 19.Double 35 =
  20. 20.Half of 166 =
  21. 21.Half of 164 =
  22. 22.Half of 104 =
  23. 23.Double 21 =
  24. 24.Half of 194 =
  25. 25.Double 49 =
  26. 26.Half of 108 =
  27. 27.Half of 32 =
  28. 28.Half of 52 =
  29. 29.Double 11 =
  30. 30.Double 33 =
  31. 31.Half of 172 =
  32. 32.Double 41 =
  33. 33.Half of 148 =
  34. 34.Double 31 =
  35. 35.Half of 44 =
  36. 36.Double 24 =
  37. 37.Double 69 =
  38. 38.Half of 16 =
  39. 39.Double 75 =
  40. 40.Double 83 =

Answer key

  1. 51
  2. 36
  3. 110
  4. 33
  5. 96
  6. 102
  7. 26
  8. 128
  9. 44
  10. 13
  11. 172
  12. 54
  13. 71
  14. 130
  15. 28
  16. 19
  17. 32
  18. 37
  19. 70
  20. 83
  21. 82
  22. 52
  23. 42
  24. 97
  25. 98
  26. 54
  27. 16
  28. 26
  29. 22
  30. 66
  31. 86
  32. 82
  33. 74
  34. 62
  35. 22
  36. 48
  37. 138
  38. 8
  39. 150
  40. 166

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