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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 708 · 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 97 =
  2. 2.Half of 36 =
  3. 3.Double 43 =
  4. 4.Double 67 =
  5. 5.Double 96 =
  6. 6.Half of 148 =
  7. 7.Double 65 =
  8. 8.Double 31 =
  9. 9.Double 68 =
  10. 10.Half of 152 =
  11. 11.Half of 118 =
  12. 12.Double 49 =
  13. 13.Double 77 =
  14. 14.Half of 172 =
  15. 15.Half of 126 =
  16. 16.Double 47 =
  17. 17.Double 98 =
  18. 18.Half of 82 =
  19. 19.Double 62 =
  20. 20.Double 17 =
  21. 21.Double 78 =
  22. 22.Double 12 =
  23. 23.Half of 162 =
  24. 24.Double 23 =
  25. 25.Half of 18 =
  26. 26.Double 89 =
  27. 27.Double 21 =
  28. 28.Half of 194 =
  29. 29.Half of 114 =
  30. 30.Double 71 =
  31. 31.Half of 102 =
  32. 32.Half of 52 =
  33. 33.Double 51 =
  34. 34.Half of 138 =
  35. 35.Half of 168 =
  36. 36.Half of 74 =
  37. 37.Double 63 =
  38. 38.Half of 174 =
  39. 39.Double 53 =
  40. 40.Double 79 =

Answer key

  1. 194
  2. 18
  3. 86
  4. 134
  5. 192
  6. 74
  7. 130
  8. 62
  9. 136
  10. 76
  11. 59
  12. 98
  13. 154
  14. 86
  15. 63
  16. 94
  17. 196
  18. 41
  19. 124
  20. 34
  21. 156
  22. 24
  23. 81
  24. 46
  25. 9
  26. 178
  27. 42
  28. 97
  29. 57
  30. 142
  31. 51
  32. 26
  33. 102
  34. 69
  35. 84
  36. 37
  37. 126
  38. 87
  39. 106
  40. 158

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