
[3.25*(4.7-3.5)]/1.25用简便方法怎么计算
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[3.25*(4.7-3.5)]/1.25
=3.25x(4.7-3.5)/1.25
=3.25x1.2/1.25
=3.25x(1+0.2)/1.25
=(3.25+0.65)/1.25
=3.9/1.25
=39/10/(5/4)
=39/10x4/5
=78/25
=3.12
=3.25x(4.7-3.5)/1.25
=3.25x1.2/1.25
=3.25x(1+0.2)/1.25
=(3.25+0.65)/1.25
=3.9/1.25
=39/10/(5/4)
=39/10x4/5
=78/25
=3.12
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