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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 658 · 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 91 =
  2. 2.Half of 98 =
  3. 3.Half of 68 =
  4. 4.Double 67 =
  5. 5.Half of 138 =
  6. 6.Double 81 =
  7. 7.Double 14 =
  8. 8.Double 34 =
  9. 9.Double 49 =
  10. 10.Double 26 =
  11. 11.Half of 154 =
  12. 12.Half of 18 =
  13. 13.Half of 162 =
  14. 14.Double 35 =
  15. 15.Double 28 =
  16. 16.Double 65 =
  17. 17.Half of 26 =
  18. 18.Double 56 =
  19. 19.Double 31 =
  20. 20.Half of 158 =
  21. 21.Double 64 =
  22. 22.Double 19 =
  23. 23.Half of 28 =
  24. 24.Half of 122 =
  25. 25.Half of 174 =
  26. 26.Double 48 =
  27. 27.Double 82 =
  28. 28.Half of 56 =
  29. 29.Half of 184 =
  30. 30.Double 59 =
  31. 31.Double 61 =
  32. 32.Double 24 =
  33. 33.Double 52 =
  34. 34.Double 75 =
  35. 35.Double 98 =
  36. 36.Double 16 =
  37. 37.Double 36 =
  38. 38.Half of 76 =
  39. 39.Half of 156 =
  40. 40.Half of 152 =

Answer key

  1. 182
  2. 49
  3. 34
  4. 134
  5. 69
  6. 162
  7. 28
  8. 68
  9. 98
  10. 52
  11. 77
  12. 9
  13. 81
  14. 70
  15. 56
  16. 130
  17. 13
  18. 112
  19. 62
  20. 79
  21. 128
  22. 38
  23. 14
  24. 61
  25. 87
  26. 96
  27. 164
  28. 28
  29. 92
  30. 118
  31. 122
  32. 48
  33. 104
  34. 150
  35. 196
  36. 32
  37. 72
  38. 38
  39. 78
  40. 76

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