2减6/31除9/62+2/3 4.4乘25
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2减6/31除9/62+2/34.4乘252减6/31除9/62+2/34.4乘252减6/31除9/62+2/34.4乘25=2-2/31x62/9+2/3+4x25+0.4x25=2-4/3+2/
2减6/31除9/62+2/3 4.4乘25
2减6/31除9/62+2/3 4.4乘25
2减6/31除9/62+2/3 4.4乘25
=2-2/31x62/9+2/3+4x25+0.4x25
=2-4/3+2/3+100+10
=2-6/3+110
=110
用计算机啊