4.7/4+4.3*0.25+0.25 ( 用简便方法计算)
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4.7/4+4.3*0.25+0.25 ( 用简便方法计算)
4.7/4+4.3*0.25+0.25
=4.7*0.25+4.3*0.25+0.25
=(4.7+4.3+1)*0.25
=10*0.25
=2.5
=4.7*0.25+4.3*0.25+0.25
=(4.7+4.3+1)*0.25
=10*0.25
=2.5