5/17÷9+1/9×12/17 简便计算

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5/17÷9+1/9×12/17简便计算5/17÷9+1/9×12/17简便计算5/17÷9+1/9×12/17简便计算5/17÷9+1/9×12/17=5/17*1/9+1/9*12/17=1/9*

5/17÷9+1/9×12/17 简便计算
5/17÷9+1/9×12/17 简便计算

5/17÷9+1/9×12/17 简便计算
5/17÷9+1/9×12/17
=5/17*1/9+1/9*12/17
=1/9*(5/17+12/17)
=1/9

原式化简得 1/9*( 5/17 + 12/17 )
得 1/9 *(1 )
得 1/9

5/17÷9+1/9×12/17
=1/(17×9) ×(5+12)
=1/(17×9) ×17
=1/9