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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 191 · 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 49 =
  2. 2.Double 18 =
  3. 3.Double 31 =
  4. 4.Double 19 =
  5. 5.Half of 198 =
  6. 6.Double 12 =
  7. 7.Half of 182 =
  8. 8.Half of 186 =
  9. 9.Half of 142 =
  10. 10.Half of 188 =
  11. 11.Half of 46 =
  12. 12.Double 26 =
  13. 13.Half of 22 =
  14. 14.Double 36 =
  15. 15.Half of 152 =
  16. 16.Half of 72 =
  17. 17.Half of 192 =
  18. 18.Double 56 =
  19. 19.Double 41 =
  20. 20.Double 64 =
  21. 21.Half of 176 =
  22. 22.Half of 162 =
  23. 23.Double 51 =
  24. 24.Half of 64 =
  25. 25.Double 61 =
  26. 26.Double 87 =
  27. 27.Double 23 =
  28. 28.Double 35 =
  29. 29.Double 29 =
  30. 30.Half of 62 =
  31. 31.Double 77 =
  32. 32.Double 14 =
  33. 33.Double 95 =
  34. 34.Half of 108 =
  35. 35.Double 28 =
  36. 36.Half of 92 =
  37. 37.Double 54 =
  38. 38.Half of 84 =
  39. 39.Double 37 =
  40. 40.Half of 132 =

Answer key

  1. 98
  2. 36
  3. 62
  4. 38
  5. 99
  6. 24
  7. 91
  8. 93
  9. 71
  10. 94
  11. 23
  12. 52
  13. 11
  14. 72
  15. 76
  16. 36
  17. 96
  18. 112
  19. 82
  20. 128
  21. 88
  22. 81
  23. 102
  24. 32
  25. 122
  26. 174
  27. 46
  28. 70
  29. 58
  30. 31
  31. 154
  32. 28
  33. 190
  34. 54
  35. 56
  36. 46
  37. 108
  38. 42
  39. 74
  40. 66

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