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我來回答列式計算 1994+1/2-(1+1/3)+(2+1/2)-(3+1/3)+(4+1/2)-(5+x/3)=1991又5/6+x/3,由於你最後一句話沒打出來,我把三分後面的數值設為x了,非常抱歉
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