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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 190 · 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 61 =
  2. 2.Double 45 =
  3. 3.Half of 112 =
  4. 4.Double 69 =
  5. 5.Double 23 =
  6. 6.Half of 86 =
  7. 7.Double 48 =
  8. 8.Double 21 =
  9. 9.Double 16 =
  10. 10.Half of 158 =
  11. 11.Double 26 =
  12. 12.Double 54 =
  13. 13.Double 49 =
  14. 14.Half of 198 =
  15. 15.Half of 16 =
  16. 16.Double 72 =
  17. 17.Half of 84 =
  18. 18.Double 31 =
  19. 19.Double 22 =
  20. 20.Double 79 =
  21. 21.Double 67 =
  22. 22.Half of 66 =
  23. 23.Half of 92 =
  24. 24.Half of 152 =
  25. 25.Double 33 =
  26. 26.Double 47 =
  27. 27.Double 52 =
  28. 28.Half of 42 =
  29. 29.Double 38 =
  30. 30.Double 71 =
  31. 31.Half of 182 =
  32. 32.Double 35 =
  33. 33.Half of 102 =
  34. 34.Double 99 =
  35. 35.Half of 72 =
  36. 36.Double 13 =
  37. 37.Half of 56 =
  38. 38.Double 56 =
  39. 39.Double 53 =
  40. 40.Half of 34 =

Answer key

  1. 122
  2. 90
  3. 56
  4. 138
  5. 46
  6. 43
  7. 96
  8. 42
  9. 32
  10. 79
  11. 52
  12. 108
  13. 98
  14. 99
  15. 8
  16. 144
  17. 42
  18. 62
  19. 44
  20. 158
  21. 134
  22. 33
  23. 46
  24. 76
  25. 66
  26. 94
  27. 104
  28. 21
  29. 76
  30. 142
  31. 91
  32. 70
  33. 51
  34. 198
  35. 36
  36. 26
  37. 28
  38. 112
  39. 106
  40. 17

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