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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 602 · 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 18 =
  2. 2.Half of 86 =
  3. 3.Half of 138 =
  4. 4.Half of 182 =
  5. 5.Double 86 =
  6. 6.Double 32 =
  7. 7.Double 91 =
  8. 8.Half of 156 =
  9. 9.Double 11 =
  10. 10.Double 53 =
  11. 11.Half of 98 =
  12. 12.Double 67 =
  13. 13.Double 47 =
  14. 14.Double 55 =
  15. 15.Half of 94 =
  16. 16.Double 39 =
  17. 17.Double 23 =
  18. 18.Half of 22 =
  19. 19.Double 17 =
  20. 20.Half of 194 =
  21. 21.Double 12 =
  22. 22.Half of 38 =
  23. 23.Double 95 =
  24. 24.Half of 16 =
  25. 25.Half of 142 =
  26. 26.Double 14 =
  27. 27.Half of 174 =
  28. 28.Half of 78 =
  29. 29.Half of 72 =
  30. 30.Double 89 =
  31. 31.Half of 148 =
  32. 32.Half of 192 =
  33. 33.Double 35 =
  34. 34.Double 13 =
  35. 35.Double 15 =
  36. 36.Double 36 =
  37. 37.Double 41 =
  38. 38.Half of 96 =
  39. 39.Double 21 =
  40. 40.Double 52 =

Answer key

  1. 36
  2. 43
  3. 69
  4. 91
  5. 172
  6. 64
  7. 182
  8. 78
  9. 22
  10. 106
  11. 49
  12. 134
  13. 94
  14. 110
  15. 47
  16. 78
  17. 46
  18. 11
  19. 34
  20. 97
  21. 24
  22. 19
  23. 190
  24. 8
  25. 71
  26. 28
  27. 87
  28. 39
  29. 36
  30. 178
  31. 74
  32. 96
  33. 70
  34. 26
  35. 30
  36. 72
  37. 82
  38. 48
  39. 42
  40. 104

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