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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 334 · 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 162 =
  2. 2.Half of 192 =
  3. 3.Double 56 =
  4. 4.Double 55 =
  5. 5.Double 31 =
  6. 6.Double 71 =
  7. 7.Half of 22 =
  8. 8.Half of 98 =
  9. 9.Double 93 =
  10. 10.Half of 12 =
  11. 11.Half of 44 =
  12. 12.Half of 148 =
  13. 13.Double 45 =
  14. 14.Double 81 =
  15. 15.Half of 54 =
  16. 16.Double 48 =
  17. 17.Half of 178 =
  18. 18.Double 46 =
  19. 19.Double 59 =
  20. 20.Half of 74 =
  21. 21.Half of 194 =
  22. 22.Half of 186 =
  23. 23.Double 99 =
  24. 24.Half of 92 =
  25. 25.Half of 102 =
  26. 26.Double 11 =
  27. 27.Double 14 =
  28. 28.Double 62 =
  29. 29.Double 21 =
  30. 30.Half of 42 =
  31. 31.Double 42 =
  32. 32.Double 67 =
  33. 33.Double 44 =
  34. 34.Double 84 =
  35. 35.Double 29 =
  36. 36.Double 64 =
  37. 37.Half of 122 =
  38. 38.Double 39 =
  39. 39.Double 22 =
  40. 40.Half of 158 =

Answer key

  1. 81
  2. 96
  3. 112
  4. 110
  5. 62
  6. 142
  7. 11
  8. 49
  9. 186
  10. 6
  11. 22
  12. 74
  13. 90
  14. 162
  15. 27
  16. 96
  17. 89
  18. 92
  19. 118
  20. 37
  21. 97
  22. 93
  23. 198
  24. 46
  25. 51
  26. 22
  27. 28
  28. 124
  29. 42
  30. 21
  31. 84
  32. 134
  33. 88
  34. 168
  35. 58
  36. 128
  37. 61
  38. 78
  39. 44
  40. 79

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