1.625×3.2÷5.3÷1又5/8÷1.625

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1.625×3.2÷5.3÷1又5/8÷1.625

1.625×3.2÷5.3÷1又5/8÷1.625
1.625×3.2÷5.3÷1又5/8÷1.625

1.625×3.2÷5.3÷1又5/8÷1.625
1.625×3.2÷5.3÷1又5/8÷1.625
=13/8x16/5+53/10x13/8+13/8÷13/8
=13/8x(16/5+53/10)+1
=13/8x17/2+1
=221/16+1
=237/16