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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 825 · 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 33 =
  2. 2.Half of 78 =
  3. 3.Double 25 =
  4. 4.Half of 24 =
  5. 5.Double 56 =
  6. 6.Double 28 =
  7. 7.Half of 22 =
  8. 8.Half of 102 =
  9. 9.Double 53 =
  10. 10.Double 19 =
  11. 11.Half of 158 =
  12. 12.Half of 12 =
  13. 13.Double 24 =
  14. 14.Half of 42 =
  15. 15.Double 81 =
  16. 16.Half of 108 =
  17. 17.Half of 132 =
  18. 18.Half of 26 =
  19. 19.Double 49 =
  20. 20.Double 26 =
  21. 21.Double 91 =
  22. 22.Double 83 =
  23. 23.Double 23 =
  24. 24.Double 16 =
  25. 25.Double 27 =
  26. 26.Half of 166 =
  27. 27.Half of 86 =
  28. 28.Double 36 =
  29. 29.Double 18 =
  30. 30.Half of 18 =
  31. 31.Half of 198 =
  32. 32.Double 72 =
  33. 33.Double 94 =
  34. 34.Double 99 =
  35. 35.Double 69 =
  36. 36.Half of 168 =
  37. 37.Double 58 =
  38. 38.Double 21 =
  39. 39.Half of 72 =
  40. 40.Half of 34 =

Answer key

  1. 66
  2. 39
  3. 50
  4. 12
  5. 112
  6. 56
  7. 11
  8. 51
  9. 106
  10. 38
  11. 79
  12. 6
  13. 48
  14. 21
  15. 162
  16. 54
  17. 66
  18. 13
  19. 98
  20. 52
  21. 182
  22. 166
  23. 46
  24. 32
  25. 54
  26. 83
  27. 43
  28. 72
  29. 36
  30. 9
  31. 99
  32. 144
  33. 188
  34. 198
  35. 138
  36. 84
  37. 116
  38. 42
  39. 36
  40. 17

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