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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 791 · 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 46 =
  2. 2.Half of 12 =
  3. 3.Double 31 =
  4. 4.Double 61 =
  5. 5.Half of 94 =
  6. 6.Double 55 =
  7. 7.Half of 84 =
  8. 8.Double 15 =
  9. 9.Double 35 =
  10. 10.Half of 34 =
  11. 11.Double 22 =
  12. 12.Double 11 =
  13. 13.Double 18 =
  14. 14.Half of 62 =
  15. 15.Half of 182 =
  16. 16.Half of 192 =
  17. 17.Double 27 =
  18. 18.Double 84 =
  19. 19.Double 93 =
  20. 20.Half of 138 =
  21. 21.Double 67 =
  22. 22.Double 64 =
  23. 23.Half of 82 =
  24. 24.Double 99 =
  25. 25.Half of 134 =
  26. 26.Double 63 =
  27. 27.Double 75 =
  28. 28.Half of 108 =
  29. 29.Double 79 =
  30. 30.Double 23 =
  31. 31.Half of 88 =
  32. 32.Half of 64 =
  33. 33.Double 71 =
  34. 34.Half of 72 =
  35. 35.Double 12 =
  36. 36.Double 48 =
  37. 37.Double 41 =
  38. 38.Half of 114 =
  39. 39.Double 25 =
  40. 40.Half of 76 =

Answer key

  1. 23
  2. 6
  3. 62
  4. 122
  5. 47
  6. 110
  7. 42
  8. 30
  9. 70
  10. 17
  11. 44
  12. 22
  13. 36
  14. 31
  15. 91
  16. 96
  17. 54
  18. 168
  19. 186
  20. 69
  21. 134
  22. 128
  23. 41
  24. 198
  25. 67
  26. 126
  27. 150
  28. 54
  29. 158
  30. 46
  31. 44
  32. 32
  33. 142
  34. 36
  35. 24
  36. 96
  37. 82
  38. 57
  39. 50
  40. 38

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