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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 59 · 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.Half of 178 =
  2. 2.Double 76 =
  3. 3.Half of 136 =
  4. 4.Double 78 =
  5. 5.Half of 164 =
  6. 6.Half of 168 =
  7. 7.Half of 92 =
  8. 8.Double 31 =
  9. 9.Half of 192 =
  10. 10.Half of 64 =
  11. 11.Half of 118 =
  12. 12.Half of 176 =
  13. 13.Half of 156 =
  14. 14.Half of 42 =
  15. 15.Double 55 =
  16. 16.Double 37 =
  17. 17.Half of 68 =
  18. 18.Double 71 =
  19. 19.Half of 124 =
  20. 20.Half of 18 =
  21. 21.Half of 142 =
  22. 22.Double 89 =
  23. 23.Double 74 =
  24. 24.Half of 152 =
  25. 25.Half of 38 =
  26. 26.Half of 82 =
  27. 27.Double 25 =
  28. 28.Double 44 =
  29. 29.Double 24 =
  30. 30.Half of 144 =
  31. 31.Half of 26 =
  32. 32.Double 51 =
  33. 33.Double 15 =
  34. 34.Half of 32 =
  35. 35.Double 53 =
  36. 36.Half of 172 =
  37. 37.Half of 138 =
  38. 38.Double 17 =
  39. 39.Double 19 =
  40. 40.Double 43 =

Answer key

  1. 89
  2. 152
  3. 68
  4. 156
  5. 82
  6. 84
  7. 46
  8. 62
  9. 96
  10. 32
  11. 59
  12. 88
  13. 78
  14. 21
  15. 110
  16. 74
  17. 34
  18. 142
  19. 62
  20. 9
  21. 71
  22. 178
  23. 148
  24. 76
  25. 19
  26. 41
  27. 50
  28. 88
  29. 48
  30. 72
  31. 13
  32. 102
  33. 30
  34. 16
  35. 106
  36. 86
  37. 69
  38. 34
  39. 38
  40. 86

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