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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 93 · 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 85 =
  2. 2.Half of 126 =
  3. 3.Half of 182 =
  4. 4.Double 25 =
  5. 5.Double 63 =
  6. 6.Double 95 =
  7. 7.Double 59 =
  8. 8.Half of 12 =
  9. 9.Double 51 =
  10. 10.Double 34 =
  11. 11.Half of 152 =
  12. 12.Double 44 =
  13. 13.Half of 68 =
  14. 14.Double 21 =
  15. 15.Double 94 =
  16. 16.Half of 42 =
  17. 17.Half of 116 =
  18. 18.Half of 108 =
  19. 19.Half of 16 =
  20. 20.Half of 176 =
  21. 21.Double 28 =
  22. 22.Double 58 =
  23. 23.Double 61 =
  24. 24.Half of 78 =
  25. 25.Double 18 =
  26. 26.Half of 18 =
  27. 27.Half of 72 =
  28. 28.Half of 156 =
  29. 29.Double 82 =
  30. 30.Double 79 =
  31. 31.Double 55 =
  32. 32.Double 26 =
  33. 33.Half of 104 =
  34. 34.Double 46 =
  35. 35.Half of 62 =
  36. 36.Double 11 =
  37. 37.Double 41 =
  38. 38.Double 69 =
  39. 39.Half of 84 =
  40. 40.Double 89 =

Answer key

  1. 170
  2. 63
  3. 91
  4. 50
  5. 126
  6. 190
  7. 118
  8. 6
  9. 102
  10. 68
  11. 76
  12. 88
  13. 34
  14. 42
  15. 188
  16. 21
  17. 58
  18. 54
  19. 8
  20. 88
  21. 56
  22. 116
  23. 122
  24. 39
  25. 36
  26. 9
  27. 36
  28. 78
  29. 164
  30. 158
  31. 110
  32. 52
  33. 52
  34. 92
  35. 31
  36. 22
  37. 82
  38. 138
  39. 42
  40. 178

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