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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 64 · 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.Half of 138 =
  2. 2.Double 48 =
  3. 3.Double 35 =
  4. 4.Double 21 =
  5. 5.Double 31 =
  6. 6.Half of 22 =
  7. 7.Half of 18 =
  8. 8.Half of 24 =
  9. 9.Double 37 =
  10. 10.Half of 146 =
  11. 11.Half of 14 =
  12. 12.Double 64 =
  13. 13.Double 91 =
  14. 14.Double 83 =
  15. 15.Double 26 =
  16. 16.Half of 182 =
  17. 17.Double 41 =
  18. 18.Half of 112 =
  19. 19.Double 46 =
  20. 20.Half of 54 =
  21. 21.Half of 52 =
  22. 22.Double 56 =
  23. 23.Double 38 =
  24. 24.Half of 16 =
  25. 25.Double 95 =
  26. 26.Half of 128 =
  27. 27.Double 62 =
  28. 28.Double 71 =
  29. 29.Half of 66 =
  30. 30.Double 96 =
  31. 31.Half of 104 =
  32. 32.Double 73 =
  33. 33.Half of 114 =
  34. 34.Double 86 =
  35. 35.Half of 32 =
  36. 36.Double 51 =
  37. 37.Half of 188 =
  38. 38.Half of 136 =
  39. 39.Half of 132 =
  40. 40.Double 74 =

Answer key

  1. 69
  2. 96
  3. 70
  4. 42
  5. 62
  6. 11
  7. 9
  8. 12
  9. 74
  10. 73
  11. 7
  12. 128
  13. 182
  14. 166
  15. 52
  16. 91
  17. 82
  18. 56
  19. 92
  20. 27
  21. 26
  22. 112
  23. 76
  24. 8
  25. 190
  26. 64
  27. 124
  28. 142
  29. 33
  30. 192
  31. 52
  32. 146
  33. 57
  34. 172
  35. 16
  36. 102
  37. 94
  38. 68
  39. 66
  40. 148

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