1斤蔥有蔥白0.5斤,蔥綠0.5 斤,所以0.5斤蔥白價格應為7毛,0.5斤蔥綠因該為3毛。
1斤蔥白7毛 1斤蔥綠3毛,所以他賣的2斤的蔥的價格為1元,所以賣蔥的錯了。
1斤蔥有蔥白0.5斤,蔥綠0.5 斤,所以0.5斤蔥白價格應為7毛,0.5斤蔥綠因該為3毛。
1斤蔥白7毛 1斤蔥綠3毛,所以他賣的2斤的蔥的價格為1元,所以賣蔥的錯了。
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