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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 536 · 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 98 =
  2. 2.Double 22 =
  3. 3.Half of 84 =
  4. 4.Double 34 =
  5. 5.Double 66 =
  6. 6.Double 29 =
  7. 7.Half of 176 =
  8. 8.Double 48 =
  9. 9.Double 13 =
  10. 10.Double 31 =
  11. 11.Double 41 =
  12. 12.Half of 32 =
  13. 13.Double 83 =
  14. 14.Half of 174 =
  15. 15.Double 99 =
  16. 16.Half of 102 =
  17. 17.Half of 142 =
  18. 18.Double 38 =
  19. 19.Half of 168 =
  20. 20.Half of 82 =
  21. 21.Double 87 =
  22. 22.Half of 62 =
  23. 23.Double 71 =
  24. 24.Half of 106 =
  25. 25.Double 26 =
  26. 26.Double 42 =
  27. 27.Half of 74 =
  28. 28.Double 96 =
  29. 29.Double 12 =
  30. 30.Half of 192 =
  31. 31.Double 51 =
  32. 32.Double 84 =
  33. 33.Double 61 =
  34. 34.Half of 52 =
  35. 35.Half of 38 =
  36. 36.Half of 198 =
  37. 37.Half of 146 =
  38. 38.Double 59 =
  39. 39.Double 64 =
  40. 40.Half of 12 =

Answer key

  1. 196
  2. 44
  3. 42
  4. 68
  5. 132
  6. 58
  7. 88
  8. 96
  9. 26
  10. 62
  11. 82
  12. 16
  13. 166
  14. 87
  15. 198
  16. 51
  17. 71
  18. 76
  19. 84
  20. 41
  21. 174
  22. 31
  23. 142
  24. 53
  25. 52
  26. 84
  27. 37
  28. 192
  29. 24
  30. 96
  31. 102
  32. 168
  33. 122
  34. 26
  35. 19
  36. 99
  37. 73
  38. 118
  39. 128
  40. 6

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