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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 633 · 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 42 =
  2. 2.Double 32 =
  3. 3.Half of 12 =
  4. 4.Half of 88 =
  5. 5.Half of 182 =
  6. 6.Double 61 =
  7. 7.Half of 64 =
  8. 8.Double 45 =
  9. 9.Half of 176 =
  10. 10.Double 19 =
  11. 11.Half of 152 =
  12. 12.Double 94 =
  13. 13.Double 31 =
  14. 14.Double 17 =
  15. 15.Half of 16 =
  16. 16.Half of 106 =
  17. 17.Double 22 =
  18. 18.Double 16 =
  19. 19.Half of 46 =
  20. 20.Half of 172 =
  21. 21.Double 48 =
  22. 22.Half of 68 =
  23. 23.Double 68 =
  24. 24.Double 51 =
  25. 25.Double 33 =
  26. 26.Half of 78 =
  27. 27.Double 18 =
  28. 28.Double 97 =
  29. 29.Half of 32 =
  30. 30.Half of 126 =
  31. 31.Half of 132 =
  32. 32.Double 27 =
  33. 33.Double 15 =
  34. 34.Double 26 =
  35. 35.Half of 128 =
  36. 36.Half of 18 =
  37. 37.Half of 26 =
  38. 38.Double 41 =
  39. 39.Half of 34 =
  40. 40.Half of 96 =

Answer key

  1. 21
  2. 64
  3. 6
  4. 44
  5. 91
  6. 122
  7. 32
  8. 90
  9. 88
  10. 38
  11. 76
  12. 188
  13. 62
  14. 34
  15. 8
  16. 53
  17. 44
  18. 32
  19. 23
  20. 86
  21. 96
  22. 34
  23. 136
  24. 102
  25. 66
  26. 39
  27. 36
  28. 194
  29. 16
  30. 63
  31. 66
  32. 54
  33. 30
  34. 52
  35. 64
  36. 9
  37. 13
  38. 82
  39. 17
  40. 48

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