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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 635 · 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 32 =
  2. 2.Double 82 =
  3. 3.Double 84 =
  4. 4.Double 99 =
  5. 5.Double 22 =
  6. 6.Double 94 =
  7. 7.Half of 112 =
  8. 8.Half of 32 =
  9. 9.Half of 166 =
  10. 10.Double 16 =
  11. 11.Half of 98 =
  12. 12.Double 95 =
  13. 13.Double 43 =
  14. 14.Half of 144 =
  15. 15.Double 33 =
  16. 16.Double 71 =
  17. 17.Double 21 =
  18. 18.Half of 92 =
  19. 19.Double 89 =
  20. 20.Double 46 =
  21. 21.Double 44 =
  22. 22.Double 24 =
  23. 23.Half of 164 =
  24. 24.Double 35 =
  25. 25.Half of 46 =
  26. 26.Double 15 =
  27. 27.Half of 54 =
  28. 28.Double 28 =
  29. 29.Half of 172 =
  30. 30.Half of 168 =
  31. 31.Double 17 =
  32. 32.Half of 154 =
  33. 33.Double 62 =
  34. 34.Half of 148 =
  35. 35.Double 49 =
  36. 36.Half of 142 =
  37. 37.Double 12 =
  38. 38.Half of 176 =
  39. 39.Half of 74 =
  40. 40.Double 37 =

Answer key

  1. 64
  2. 164
  3. 168
  4. 198
  5. 44
  6. 188
  7. 56
  8. 16
  9. 83
  10. 32
  11. 49
  12. 190
  13. 86
  14. 72
  15. 66
  16. 142
  17. 42
  18. 46
  19. 178
  20. 92
  21. 88
  22. 48
  23. 82
  24. 70
  25. 23
  26. 30
  27. 27
  28. 56
  29. 86
  30. 84
  31. 34
  32. 77
  33. 124
  34. 74
  35. 98
  36. 71
  37. 24
  38. 88
  39. 37
  40. 74

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