(2/3+2/9)*(5/8减7/16)= 1/6除【9/17乘(3/4+2/3)】= 要简便运算(2/3+2/9)*(5/8减7/16)=1/6除【9/17乘(3/4+2/3)】=要简便运算,

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(2/3+2/9)*(5/8减7/16)= 1/6除【9/17乘(3/4+2/3)】= 要简便运算(2/3+2/9)*(5/8减7/16)=1/6除【9/17乘(3/4+2/3)】=要简便运算,

(2/3+2/9)*(5/8减7/16)= 1/6除【9/17乘(3/4+2/3)】= 要简便运算(2/3+2/9)*(5/8减7/16)=1/6除【9/17乘(3/4+2/3)】=要简便运算,
(2/3+2/9)*(5/8减7/16)= 1/6除【9/17乘(3/4+2/3)】= 要简便运算
(2/3+2/9)*(5/8减7/16)=
1/6除【9/17乘(3/4+2/3)】=
要简便运算,

(2/3+2/9)*(5/8减7/16)= 1/6除【9/17乘(3/4+2/3)】= 要简便运算(2/3+2/9)*(5/8减7/16)=1/6除【9/17乘(3/4+2/3)】=要简便运算,
(2/3+2/9)*(5/8减7/16)
=8/9x3/16
=1/6
1/6除【9/17乘(3/4+2/3)】
=1/6÷(9/17x17/12)
=1/6÷3/4
=2/9
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