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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 844 · 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 51 =
  2. 2.Double 66 =
  3. 3.Double 68 =
  4. 4.Half of 162 =
  5. 5.Double 41 =
  6. 6.Double 23 =
  7. 7.Half of 32 =
  8. 8.Half of 104 =
  9. 9.Half of 66 =
  10. 10.Double 44 =
  11. 11.Half of 42 =
  12. 12.Half of 72 =
  13. 13.Double 36 =
  14. 14.Half of 52 =
  15. 15.Half of 112 =
  16. 16.Half of 38 =
  17. 17.Half of 48 =
  18. 18.Half of 78 =
  19. 19.Half of 92 =
  20. 20.Half of 156 =
  21. 21.Half of 22 =
  22. 22.Half of 12 =
  23. 23.Double 71 =
  24. 24.Half of 198 =
  25. 25.Half of 82 =
  26. 26.Half of 114 =
  27. 27.Half of 196 =
  28. 28.Half of 84 =
  29. 29.Half of 34 =
  30. 30.Double 27 =
  31. 31.Half of 192 =
  32. 32.Half of 144 =
  33. 33.Half of 152 =
  34. 34.Double 38 =
  35. 35.Double 19 =
  36. 36.Double 91 =
  37. 37.Double 82 =
  38. 38.Half of 142 =
  39. 39.Double 48 =
  40. 40.Double 89 =

Answer key

  1. 102
  2. 132
  3. 136
  4. 81
  5. 82
  6. 46
  7. 16
  8. 52
  9. 33
  10. 88
  11. 21
  12. 36
  13. 72
  14. 26
  15. 56
  16. 19
  17. 24
  18. 39
  19. 46
  20. 78
  21. 11
  22. 6
  23. 142
  24. 99
  25. 41
  26. 57
  27. 98
  28. 42
  29. 17
  30. 54
  31. 96
  32. 72
  33. 76
  34. 76
  35. 38
  36. 182
  37. 164
  38. 71
  39. 96
  40. 178

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