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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 18 · 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 24 =
  2. 2.Half of 64 =
  3. 3.Double 42 =
  4. 4.Half of 152 =
  5. 5.Double 87 =
  6. 6.Half of 52 =
  7. 7.Double 16 =
  8. 8.Half of 138 =
  9. 9.Half of 124 =
  10. 10.Double 61 =
  11. 11.Double 35 =
  12. 12.Double 49 =
  13. 13.Half of 48 =
  14. 14.Double 73 =
  15. 15.Half of 122 =
  16. 16.Double 57 =
  17. 17.Double 31 =
  18. 18.Double 33 =
  19. 19.Double 47 =
  20. 20.Half of 94 =
  21. 21.Half of 98 =
  22. 22.Half of 92 =
  23. 23.Double 14 =
  24. 24.Half of 112 =
  25. 25.Half of 24 =
  26. 26.Half of 46 =
  27. 27.Half of 102 =
  28. 28.Double 66 =
  29. 29.Double 17 =
  30. 30.Half of 14 =
  31. 31.Half of 66 =
  32. 32.Half of 74 =
  33. 33.Half of 54 =
  34. 34.Double 55 =
  35. 35.Half of 136 =
  36. 36.Double 81 =
  37. 37.Double 92 =
  38. 38.Double 91 =
  39. 39.Half of 22 =
  40. 40.Half of 126 =

Answer key

  1. 48
  2. 32
  3. 84
  4. 76
  5. 174
  6. 26
  7. 32
  8. 69
  9. 62
  10. 122
  11. 70
  12. 98
  13. 24
  14. 146
  15. 61
  16. 114
  17. 62
  18. 66
  19. 94
  20. 47
  21. 49
  22. 46
  23. 28
  24. 56
  25. 12
  26. 23
  27. 51
  28. 132
  29. 34
  30. 7
  31. 33
  32. 37
  33. 27
  34. 110
  35. 68
  36. 162
  37. 184
  38. 182
  39. 11
  40. 63

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