第1根是4份,第2根是5份,1/4米是5-4=1份
则第二根长5*1/4=5/4米
2根木料,第二根比第一根长4分之一,第一根比第二根短四分之一米.问第二根长几米?
2根木料,第二根比第一根长4分之一,第一根比第二根短四分之一米.问第二根长几米?
数学人气:980 ℃时间:2020-05-03 05:48:31
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