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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 228 · 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 37 =
  2. 2.Half of 132 =
  3. 3.Half of 138 =
  4. 4.Half of 98 =
  5. 5.Half of 134 =
  6. 6.Double 81 =
  7. 7.Double 29 =
  8. 8.Half of 122 =
  9. 9.Half of 162 =
  10. 10.Half of 92 =
  11. 11.Double 19 =
  12. 12.Double 51 =
  13. 13.Double 42 =
  14. 14.Half of 58 =
  15. 15.Half of 148 =
  16. 16.Double 72 =
  17. 17.Half of 172 =
  18. 18.Double 18 =
  19. 19.Double 88 =
  20. 20.Half of 48 =
  21. 21.Half of 182 =
  22. 22.Double 49 =
  23. 23.Half of 188 =
  24. 24.Half of 22 =
  25. 25.Double 95 =
  26. 26.Half of 16 =
  27. 27.Half of 84 =
  28. 28.Double 58 =
  29. 29.Double 68 =
  30. 30.Half of 82 =
  31. 31.Half of 168 =
  32. 32.Half of 116 =
  33. 33.Double 73 =
  34. 34.Half of 102 =
  35. 35.Double 71 =
  36. 36.Double 14 =
  37. 37.Double 35 =
  38. 38.Double 66 =
  39. 39.Double 77 =
  40. 40.Double 97 =

Answer key

  1. 74
  2. 66
  3. 69
  4. 49
  5. 67
  6. 162
  7. 58
  8. 61
  9. 81
  10. 46
  11. 38
  12. 102
  13. 84
  14. 29
  15. 74
  16. 144
  17. 86
  18. 36
  19. 176
  20. 24
  21. 91
  22. 98
  23. 94
  24. 11
  25. 190
  26. 8
  27. 42
  28. 116
  29. 136
  30. 41
  31. 84
  32. 58
  33. 146
  34. 51
  35. 142
  36. 28
  37. 70
  38. 132
  39. 154
  40. 194

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