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5/17÷(1/5+5/17) =5/17÷42/85 =5/17×85/42 =25/42
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其他回答
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(5/17+5/37)*17*307=5/17*17*307+5/37*17*307=5*307+26095/17=1535+26095/17=52190/17
5/17÷(1/5+5/17) =5/17÷42/85 =5/17×85/42 =25/42
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(5/17+5/37)*17*307=5/17*17*307+5/37*17*307=5*307+26095/17=1535+26095/17=52190/17