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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 515 · 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 31 =
  2. 2.Double 24 =
  3. 3.Double 18 =
  4. 4.Half of 74 =
  5. 5.Double 76 =
  6. 6.Half of 36 =
  7. 7.Half of 44 =
  8. 8.Half of 178 =
  9. 9.Double 12 =
  10. 10.Half of 192 =
  11. 11.Double 48 =
  12. 12.Half of 92 =
  13. 13.Double 41 =
  14. 14.Double 95 =
  15. 15.Half of 32 =
  16. 16.Double 79 =
  17. 17.Double 36 =
  18. 18.Double 69 =
  19. 19.Double 57 =
  20. 20.Half of 42 =
  21. 21.Double 27 =
  22. 22.Half of 174 =
  23. 23.Double 47 =
  24. 24.Half of 98 =
  25. 25.Half of 46 =
  26. 26.Double 16 =
  27. 27.Double 11 =
  28. 28.Half of 118 =
  29. 29.Half of 124 =
  30. 30.Double 55 =
  31. 31.Half of 128 =
  32. 32.Double 35 =
  33. 33.Half of 114 =
  34. 34.Half of 194 =
  35. 35.Half of 126 =
  36. 36.Double 51 =
  37. 37.Double 14 =
  38. 38.Double 33 =
  39. 39.Half of 52 =
  40. 40.Double 96 =

Answer key

  1. 62
  2. 48
  3. 36
  4. 37
  5. 152
  6. 18
  7. 22
  8. 89
  9. 24
  10. 96
  11. 96
  12. 46
  13. 82
  14. 190
  15. 16
  16. 158
  17. 72
  18. 138
  19. 114
  20. 21
  21. 54
  22. 87
  23. 94
  24. 49
  25. 23
  26. 32
  27. 22
  28. 59
  29. 62
  30. 110
  31. 64
  32. 70
  33. 57
  34. 97
  35. 63
  36. 102
  37. 28
  38. 66
  39. 26
  40. 192

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