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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 812 · 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 56 =
  2. 2.Double 34 =
  3. 3.Double 46 =
  4. 4.Half of 164 =
  5. 5.Double 11 =
  6. 6.Double 51 =
  7. 7.Half of 52 =
  8. 8.Double 65 =
  9. 9.Half of 58 =
  10. 10.Half of 176 =
  11. 11.Double 57 =
  12. 12.Double 29 =
  13. 13.Double 36 =
  14. 14.Double 91 =
  15. 15.Half of 24 =
  16. 16.Half of 62 =
  17. 17.Double 24 =
  18. 18.Half of 112 =
  19. 19.Half of 44 =
  20. 20.Half of 192 =
  21. 21.Double 22 =
  22. 22.Double 88 =
  23. 23.Half of 48 =
  24. 24.Double 16 =
  25. 25.Half of 84 =
  26. 26.Double 35 =
  27. 27.Double 43 =
  28. 28.Half of 166 =
  29. 29.Double 31 =
  30. 30.Half of 46 =
  31. 31.Half of 38 =
  32. 32.Half of 66 =
  33. 33.Double 97 =
  34. 34.Half of 146 =
  35. 35.Double 12 =
  36. 36.Half of 82 =
  37. 37.Double 27 =
  38. 38.Double 54 =
  39. 39.Double 77 =
  40. 40.Double 63 =

Answer key

  1. 112
  2. 68
  3. 92
  4. 82
  5. 22
  6. 102
  7. 26
  8. 130
  9. 29
  10. 88
  11. 114
  12. 58
  13. 72
  14. 182
  15. 12
  16. 31
  17. 48
  18. 56
  19. 22
  20. 96
  21. 44
  22. 176
  23. 24
  24. 32
  25. 42
  26. 70
  27. 86
  28. 83
  29. 62
  30. 23
  31. 19
  32. 33
  33. 194
  34. 73
  35. 24
  36. 41
  37. 54
  38. 108
  39. 154
  40. 126

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