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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 603 · 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.Double 22 =
  3. 3.Double 71 =
  4. 4.Double 26 =
  5. 5.Double 97 =
  6. 6.Half of 76 =
  7. 7.Half of 96 =
  8. 8.Double 11 =
  9. 9.Half of 16 =
  10. 10.Double 89 =
  11. 11.Half of 136 =
  12. 12.Double 81 =
  13. 13.Half of 78 =
  14. 14.Half of 22 =
  15. 15.Half of 28 =
  16. 16.Double 99 =
  17. 17.Half of 148 =
  18. 18.Double 96 =
  19. 19.Half of 54 =
  20. 20.Half of 52 =
  21. 21.Double 98 =
  22. 22.Half of 102 =
  23. 23.Half of 92 =
  24. 24.Double 52 =
  25. 25.Double 41 =
  26. 26.Half of 176 =
  27. 27.Double 15 =
  28. 28.Half of 166 =
  29. 29.Double 34 =
  30. 30.Double 85 =
  31. 31.Double 46 =
  32. 32.Half of 108 =
  33. 33.Double 18 =
  34. 34.Double 31 =
  35. 35.Half of 44 =
  36. 36.Double 13 =
  37. 37.Half of 84 =
  38. 38.Half of 62 =
  39. 39.Double 75 =
  40. 40.Half of 132 =

Answer key

  1. 81
  2. 44
  3. 142
  4. 52
  5. 194
  6. 38
  7. 48
  8. 22
  9. 8
  10. 178
  11. 68
  12. 162
  13. 39
  14. 11
  15. 14
  16. 198
  17. 74
  18. 192
  19. 27
  20. 26
  21. 196
  22. 51
  23. 46
  24. 104
  25. 82
  26. 88
  27. 30
  28. 83
  29. 68
  30. 170
  31. 92
  32. 54
  33. 36
  34. 62
  35. 22
  36. 26
  37. 42
  38. 31
  39. 150
  40. 66

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