简便计算,急(5*6/4+2.5*3/2)/(2*9/8+1*4.5/4) *=✖️ /=➗简便计算,急(5*6/4+2.5*3/2)/(2*9/8+1*4.5/4)*=✖️/=➗

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简便计算,急(5*6/4+2.5*3/2)/(2*9/8+1*4.5/4) *=✖️ /=➗简便计算,急(5*6/4+2.5*3/2)/(2*9/8+1*4.5/4)*=✖️/=➗
简便计算,急(5*6/4+2.5*3/2)/(2*9/8+1*4.5/4) *=✖️ /=➗
简便计算,急(5*6/4+2.5*3/2)/(2*9/8+1*4.5/4)
*=✖️
/=➗

简便计算,急(5*6/4+2.5*3/2)/(2*9/8+1*4.5/4) *=✖️ /=➗简便计算,急(5*6/4+2.5*3/2)/(2*9/8+1*4.5/4)*=✖️/=➗
10/3

3.6*31又2/5+43.9*6又2/5
=3.6*31.4+43.9*6.4
=3.6*31.4+(31.4+12.5)*6.4
=3.6*31.4+31.4*6.4+12.5*6.4
=31.4*(3.6+6.4)+12.5*8*0.8
=31.4*10+100*0.8
=314+80
=394