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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 722 · 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 85 =
  2. 2.Half of 104 =
  3. 3.Double 82 =
  4. 4.Double 29 =
  5. 5.Half of 42 =
  6. 6.Half of 58 =
  7. 7.Half of 152 =
  8. 8.Double 97 =
  9. 9.Double 22 =
  10. 10.Double 63 =
  11. 11.Half of 12 =
  12. 12.Double 25 =
  13. 13.Double 64 =
  14. 14.Double 74 =
  15. 15.Double 76 =
  16. 16.Double 46 =
  17. 17.Half of 54 =
  18. 18.Half of 84 =
  19. 19.Double 66 =
  20. 20.Double 79 =
  21. 21.Half of 64 =
  22. 22.Double 61 =
  23. 23.Double 31 =
  24. 24.Half of 194 =
  25. 25.Double 27 =
  26. 26.Double 95 =
  27. 27.Double 45 =
  28. 28.Half of 102 =
  29. 29.Double 87 =
  30. 30.Double 91 =
  31. 31.Double 86 =
  32. 32.Half of 26 =
  33. 33.Half of 124 =
  34. 34.Double 23 =
  35. 35.Double 58 =
  36. 36.Double 43 =
  37. 37.Double 84 =
  38. 38.Half of 24 =
  39. 39.Double 18 =
  40. 40.Half of 108 =

Answer key

  1. 170
  2. 52
  3. 164
  4. 58
  5. 21
  6. 29
  7. 76
  8. 194
  9. 44
  10. 126
  11. 6
  12. 50
  13. 128
  14. 148
  15. 152
  16. 92
  17. 27
  18. 42
  19. 132
  20. 158
  21. 32
  22. 122
  23. 62
  24. 97
  25. 54
  26. 190
  27. 90
  28. 51
  29. 174
  30. 182
  31. 172
  32. 13
  33. 62
  34. 46
  35. 116
  36. 86
  37. 168
  38. 12
  39. 36
  40. 54

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