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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 331 · 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 14 =
  2. 2.Half of 114 =
  3. 3.Double 19 =
  4. 4.Half of 134 =
  5. 5.Half of 138 =
  6. 6.Double 78 =
  7. 7.Double 35 =
  8. 8.Half of 48 =
  9. 9.Half of 82 =
  10. 10.Half of 166 =
  11. 11.Half of 142 =
  12. 12.Double 66 =
  13. 13.Half of 102 =
  14. 14.Half of 132 =
  15. 15.Double 48 =
  16. 16.Double 93 =
  17. 17.Half of 176 =
  18. 18.Half of 76 =
  19. 19.Half of 32 =
  20. 20.Half of 188 =
  21. 21.Double 31 =
  22. 22.Double 68 =
  23. 23.Half of 16 =
  24. 24.Half of 88 =
  25. 25.Double 37 =
  26. 26.Double 87 =
  27. 27.Half of 72 =
  28. 28.Double 95 =
  29. 29.Double 38 =
  30. 30.Double 61 =
  31. 31.Double 12 =
  32. 32.Double 41 =
  33. 33.Half of 38 =
  34. 34.Half of 68 =
  35. 35.Half of 22 =
  36. 36.Double 65 =
  37. 37.Double 21 =
  38. 38.Double 58 =
  39. 39.Half of 86 =
  40. 40.Double 92 =

Answer key

  1. 7
  2. 57
  3. 38
  4. 67
  5. 69
  6. 156
  7. 70
  8. 24
  9. 41
  10. 83
  11. 71
  12. 132
  13. 51
  14. 66
  15. 96
  16. 186
  17. 88
  18. 38
  19. 16
  20. 94
  21. 62
  22. 136
  23. 8
  24. 44
  25. 74
  26. 174
  27. 36
  28. 190
  29. 76
  30. 122
  31. 24
  32. 82
  33. 19
  34. 34
  35. 11
  36. 130
  37. 42
  38. 116
  39. 43
  40. 184

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