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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 199 · 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 51 =
  2. 2.Double 24 =
  3. 3.Half of 12 =
  4. 4.Double 61 =
  5. 5.Double 23 =
  6. 6.Half of 22 =
  7. 7.Double 15 =
  8. 8.Double 96 =
  9. 9.Double 34 =
  10. 10.Half of 132 =
  11. 11.Double 35 =
  12. 12.Double 65 =
  13. 13.Double 88 =
  14. 14.Half of 72 =
  15. 15.Double 25 =
  16. 16.Double 56 =
  17. 17.Double 57 =
  18. 18.Half of 98 =
  19. 19.Half of 114 =
  20. 20.Half of 108 =
  21. 21.Double 84 =
  22. 22.Half of 148 =
  23. 23.Double 49 =
  24. 24.Half of 48 =
  25. 25.Double 55 =
  26. 26.Half of 138 =
  27. 27.Double 66 =
  28. 28.Double 27 =
  29. 29.Half of 18 =
  30. 30.Half of 166 =
  31. 31.Double 44 =
  32. 32.Half of 62 =
  33. 33.Half of 198 =
  34. 34.Half of 192 =
  35. 35.Double 69 =
  36. 36.Half of 106 =
  37. 37.Double 17 =
  38. 38.Double 81 =
  39. 39.Half of 128 =
  40. 40.Half of 52 =

Answer key

  1. 102
  2. 48
  3. 6
  4. 122
  5. 46
  6. 11
  7. 30
  8. 192
  9. 68
  10. 66
  11. 70
  12. 130
  13. 176
  14. 36
  15. 50
  16. 112
  17. 114
  18. 49
  19. 57
  20. 54
  21. 168
  22. 74
  23. 98
  24. 24
  25. 110
  26. 69
  27. 132
  28. 54
  29. 9
  30. 83
  31. 88
  32. 31
  33. 99
  34. 96
  35. 138
  36. 53
  37. 34
  38. 162
  39. 64
  40. 26

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