(6.8-6.8*0.55)/8.5简便计算

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(6.8-6.8*0.55)/8.5简便计算

(6.8-6.8*0.55)/8.5简便计算
(6.8-6.8*0.55)/8.5简便计算

(6.8-6.8*0.55)/8.5简便计算
(6.8-6.8*0.55)/8.5
=6.8x(1-0.55)÷8.5
=6.8x0.45x2/17(约分得)
=0.4x0.9
=0.36

方格

6.8(1-0.55)/8.5
6.8*0.45/8.5
68*0.01*5*9/5*17
4*17*0.01*5*9/5*17
4*0.01*9
=0.36