简便方法算出(5/12+2/5)除以35/36

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简便方法算出(5/12+2/5)除以35/36
简便方法算出(5/12+2/5)除以35/36

简便方法算出(5/12+2/5)除以35/36
(5/12+2/5)÷35/36
=(5/12+2/5)×36/35
=5/12×36/35+2/5×36/35
=3/7 + 72/175
=75/175+72/175=147/175=21/25