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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 709 · 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 17 =
  2. 2.Double 45 =
  3. 3.Half of 136 =
  4. 4.Double 31 =
  5. 5.Double 48 =
  6. 6.Double 16 =
  7. 7.Double 81 =
  8. 8.Double 94 =
  9. 9.Double 91 =
  10. 10.Half of 148 =
  11. 11.Double 82 =
  12. 12.Half of 164 =
  13. 13.Double 51 =
  14. 14.Double 42 =
  15. 15.Double 76 =
  16. 16.Half of 144 =
  17. 17.Double 41 =
  18. 18.Double 13 =
  19. 19.Half of 118 =
  20. 20.Half of 28 =
  21. 21.Double 15 =
  22. 22.Double 65 =
  23. 23.Double 84 =
  24. 24.Half of 116 =
  25. 25.Half of 122 =
  26. 26.Half of 48 =
  27. 27.Half of 198 =
  28. 28.Half of 112 =
  29. 29.Half of 66 =
  30. 30.Half of 76 =
  31. 31.Half of 134 =
  32. 32.Double 21 =
  33. 33.Half of 92 =
  34. 34.Half of 72 =
  35. 35.Half of 156 =
  36. 36.Half of 174 =
  37. 37.Half of 192 =
  38. 38.Double 37 =
  39. 39.Half of 34 =
  40. 40.Double 47 =

Answer key

  1. 34
  2. 90
  3. 68
  4. 62
  5. 96
  6. 32
  7. 162
  8. 188
  9. 182
  10. 74
  11. 164
  12. 82
  13. 102
  14. 84
  15. 152
  16. 72
  17. 82
  18. 26
  19. 59
  20. 14
  21. 30
  22. 130
  23. 168
  24. 58
  25. 61
  26. 24
  27. 99
  28. 56
  29. 33
  30. 38
  31. 67
  32. 42
  33. 46
  34. 36
  35. 78
  36. 87
  37. 96
  38. 74
  39. 17
  40. 94

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