www.ypnh.net > 2×6/13÷9/26%2/3 (0.75%3/16)×(2/9+1/3) 2/5+3...

2×6/13÷9/26%2/3 (0.75%3/16)×(2/9+1/3) 2/5+3...

(0.75-3/16)÷(2/9+2/3) =(3/4-3/16)÷(2/9+6/9) =(9/16)x(9/8) =81/128

简便计算 1/3÷(4-5/13-8/13) =1/3÷【4-(5/13+8/13)】 =1/3÷【4-1】 =1/3÷3 =1/9 (0.75-3/16)x(2/9+1/3) =9/16×5/9 =5/16

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