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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 304 · 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 49 =
  2. 2.Double 95 =
  3. 3.Double 27 =
  4. 4.Half of 28 =
  5. 5.Double 92 =
  6. 6.Half of 64 =
  7. 7.Double 46 =
  8. 8.Half of 52 =
  9. 9.Double 31 =
  10. 10.Double 39 =
  11. 11.Double 71 =
  12. 12.Double 51 =
  13. 13.Double 57 =
  14. 14.Half of 48 =
  15. 15.Half of 72 =
  16. 16.Double 63 =
  17. 17.Half of 172 =
  18. 18.Half of 34 =
  19. 19.Double 86 =
  20. 20.Double 66 =
  21. 21.Double 84 =
  22. 22.Double 17 =
  23. 23.Double 18 =
  24. 24.Half of 134 =
  25. 25.Double 12 =
  26. 26.Half of 14 =
  27. 27.Half of 42 =
  28. 28.Half of 56 =
  29. 29.Half of 188 =
  30. 30.Half of 154 =
  31. 31.Double 91 =
  32. 32.Double 37 =
  33. 33.Double 24 =
  34. 34.Double 75 =
  35. 35.Double 32 =
  36. 36.Half of 182 =
  37. 37.Half of 32 =
  38. 38.Double 29 =
  39. 39.Half of 106 =
  40. 40.Double 79 =

Answer key

  1. 98
  2. 190
  3. 54
  4. 14
  5. 184
  6. 32
  7. 92
  8. 26
  9. 62
  10. 78
  11. 142
  12. 102
  13. 114
  14. 24
  15. 36
  16. 126
  17. 86
  18. 17
  19. 172
  20. 132
  21. 168
  22. 34
  23. 36
  24. 67
  25. 24
  26. 7
  27. 21
  28. 28
  29. 94
  30. 77
  31. 182
  32. 74
  33. 48
  34. 150
  35. 64
  36. 91
  37. 16
  38. 58
  39. 53
  40. 158

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