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16.21/9+16.21/6.32/2.5
=16.21/9+16.21/(6.32x2.5)
=16.21/9+16.21/(1.58x4x2.5)
=16.21/9+16.21/(1.58x10)
=16.21/9+16.21/15.8
=(16.21x15.8)/(9x15.8)+(16.21x9)/(15.8x9)
=16.21x(15.8+9)/(15.8x9)
=(16.21x24.8)/(15.8x9)
=(16.21x2x12.4)/(2x7.9x9)
=(16.21x12.4)/(7.9x9)
=201.004/71.1
=201004/71100
=50251/17775
注:79,1621都是质数。
=16.21/9+16.21/(6.32x2.5)
=16.21/9+16.21/(1.58x4x2.5)
=16.21/9+16.21/(1.58x10)
=16.21/9+16.21/15.8
=(16.21x15.8)/(9x15.8)+(16.21x9)/(15.8x9)
=16.21x(15.8+9)/(15.8x9)
=(16.21x24.8)/(15.8x9)
=(16.21x2x12.4)/(2x7.9x9)
=(16.21x12.4)/(7.9x9)
=201.004/71.1
=201004/71100
=50251/17775
注:79,1621都是质数。
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