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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 455 · 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 51 =
  2. 2.Double 47 =
  3. 3.Double 13 =
  4. 4.Half of 96 =
  5. 5.Half of 42 =
  6. 6.Half of 188 =
  7. 7.Half of 32 =
  8. 8.Double 31 =
  9. 9.Double 87 =
  10. 10.Double 66 =
  11. 11.Double 32 =
  12. 12.Half of 184 =
  13. 13.Half of 132 =
  14. 14.Double 45 =
  15. 15.Double 59 =
  16. 16.Double 43 =
  17. 17.Half of 86 =
  18. 18.Half of 122 =
  19. 19.Double 21 =
  20. 20.Double 86 =
  21. 21.Double 35 =
  22. 22.Half of 74 =
  23. 23.Half of 144 =
  24. 24.Half of 14 =
  25. 25.Half of 178 =
  26. 26.Double 83 =
  27. 27.Double 41 =
  28. 28.Half of 66 =
  29. 29.Half of 146 =
  30. 30.Double 49 =
  31. 31.Half of 62 =
  32. 32.Half of 102 =
  33. 33.Half of 92 =
  34. 34.Half of 54 =
  35. 35.Half of 142 =
  36. 36.Double 46 =
  37. 37.Half of 12 =
  38. 38.Double 54 =
  39. 39.Double 74 =
  40. 40.Half of 124 =

Answer key

  1. 102
  2. 94
  3. 26
  4. 48
  5. 21
  6. 94
  7. 16
  8. 62
  9. 174
  10. 132
  11. 64
  12. 92
  13. 66
  14. 90
  15. 118
  16. 86
  17. 43
  18. 61
  19. 42
  20. 172
  21. 70
  22. 37
  23. 72
  24. 7
  25. 89
  26. 166
  27. 82
  28. 33
  29. 73
  30. 98
  31. 31
  32. 51
  33. 46
  34. 27
  35. 71
  36. 92
  37. 6
  38. 108
  39. 148
  40. 62

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