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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 694 · 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 83 =
  2. 2.Half of 104 =
  3. 3.Half of 32 =
  4. 4.Half of 102 =
  5. 5.Double 76 =
  6. 6.Double 38 =
  7. 7.Half of 14 =
  8. 8.Half of 108 =
  9. 9.Double 82 =
  10. 10.Half of 68 =
  11. 11.Half of 152 =
  12. 12.Double 98 =
  13. 13.Double 51 =
  14. 14.Double 15 =
  15. 15.Half of 138 =
  16. 16.Double 88 =
  17. 17.Double 45 =
  18. 18.Double 87 =
  19. 19.Half of 86 =
  20. 20.Double 99 =
  21. 21.Double 54 =
  22. 22.Double 46 =
  23. 23.Half of 156 =
  24. 24.Half of 62 =
  25. 25.Half of 148 =
  26. 26.Double 26 =
  27. 27.Half of 182 =
  28. 28.Half of 44 =
  29. 29.Half of 28 =
  30. 30.Double 65 =
  31. 31.Half of 194 =
  32. 32.Double 41 =
  33. 33.Double 74 =
  34. 34.Double 42 =
  35. 35.Double 24 =
  36. 36.Half of 136 =
  37. 37.Half of 178 =
  38. 38.Double 21 =
  39. 39.Half of 42 =
  40. 40.Double 31 =

Answer key

  1. 166
  2. 52
  3. 16
  4. 51
  5. 152
  6. 76
  7. 7
  8. 54
  9. 164
  10. 34
  11. 76
  12. 196
  13. 102
  14. 30
  15. 69
  16. 176
  17. 90
  18. 174
  19. 43
  20. 198
  21. 108
  22. 92
  23. 78
  24. 31
  25. 74
  26. 52
  27. 91
  28. 22
  29. 14
  30. 130
  31. 97
  32. 82
  33. 148
  34. 84
  35. 48
  36. 68
  37. 89
  38. 42
  39. 21
  40. 62

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