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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 347 · 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 91 =
  2. 2.Double 78 =
  3. 3.Half of 152 =
  4. 4.Half of 46 =
  5. 5.Double 36 =
  6. 6.Double 33 =
  7. 7.Double 69 =
  8. 8.Double 45 =
  9. 9.Half of 38 =
  10. 10.Half of 92 =
  11. 11.Double 87 =
  12. 12.Double 21 =
  13. 13.Double 95 =
  14. 14.Double 14 =
  15. 15.Double 22 =
  16. 16.Double 72 =
  17. 17.Half of 82 =
  18. 18.Half of 168 =
  19. 19.Double 68 =
  20. 20.Half of 58 =
  21. 21.Double 92 =
  22. 22.Double 75 =
  23. 23.Half of 14 =
  24. 24.Half of 132 =
  25. 25.Double 99 =
  26. 26.Double 64 =
  27. 27.Double 27 =
  28. 28.Double 44 =
  29. 29.Double 48 =
  30. 30.Half of 134 =
  31. 31.Double 41 =
  32. 32.Half of 142 =
  33. 33.Double 71 =
  34. 34.Half of 64 =
  35. 35.Half of 158 =
  36. 36.Half of 122 =
  37. 37.Double 98 =
  38. 38.Half of 106 =
  39. 39.Double 26 =
  40. 40.Double 58 =

Answer key

  1. 182
  2. 156
  3. 76
  4. 23
  5. 72
  6. 66
  7. 138
  8. 90
  9. 19
  10. 46
  11. 174
  12. 42
  13. 190
  14. 28
  15. 44
  16. 144
  17. 41
  18. 84
  19. 136
  20. 29
  21. 184
  22. 150
  23. 7
  24. 66
  25. 198
  26. 128
  27. 54
  28. 88
  29. 96
  30. 67
  31. 82
  32. 71
  33. 142
  34. 32
  35. 79
  36. 61
  37. 196
  38. 53
  39. 52
  40. 116

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