30➗2.5-3.2X2.49.96-0.98X4(53.76-17.49)➗1.83/5➗【(1/12+1/20)X4】
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30÷2.5十1.6X2.5 二12十4 二16=1.35×0.02 =0.027(53.76-17.49)➗1.8 (53.76-17.49)/1.8= (5376-1749)/180=(5400-24-1800+51)/180=3600/180+27/180=20+3/20=20.153/5➗【(1/12+1/20)X4】3/5*(3/12+4/12)+(8+13)/20 =3/5*(7/12)+21/20 =7/20+21/20 =28/20 =7/5
咨询记录 · 回答于2022-07-05
30➗2.5-3.2X2.49.96-0.98X4(53.76-17.49)➗1.83/5➗【(1/12+1/20)X4】
30➗2.5-3.2X2.4 9.96-0.98X4 (53.76-17.49)➗1.8 3/5➗【(1/12+1/20)X4】3.2x-2.5x4=6 x=-6/6.81.9x-0.4x=0.54+0.36 1.5x=0.9x=9/15=3/5
这是四道题一道一行
能不能标记清楚 这样看我很乱的
一、30➗2.5-3.2X2.4二、9.96-0.98X4三、(53.76-17.49)➗1.8四、3/5➗【(1/12+1/20)X4】
30÷2.5十1.6X2.5 二12十4 二16=1.35×0.02 =0.027(53.76-17.49)➗1.8 (53.76-17.49)/1.8= (5376-1749)/180=(5400-24-1800+51)/180=3600/180+27/180=20+3/20=20.153/5➗【(1/12+1/20)X4】3/5*(3/12+4/12)+(8+13)/20 =3/5*(7/12)+21/20 =7/20+21/20 =28/20 =7/5