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化简求值:(﹣)÷,其中a=1﹣,b=1+.

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=AVERAGE(A1: B1), =AVERAGE(3, "8")  =COUNT(A1: B1), =COUNT(3, "8")  =MAX(A1: B1) =MAX(3, "8")  =MIN(A1: B1) =MIN(3, "8")  
O1:40,H1:40,A1:40,B1:40  O1:80,H1:160,A1:40,B1:40  O1:160,H1:160,A1:320,B1:40  O1:160,H1:40,A1:40,B1:320  O1:40,H1:320,A1:320,B1:320  
O1:40,H1:40,A1:40,B1:40  O1:80,H1:160,A1:40,B1:40  O1:160,H1:160,A1:320,B1:40  O1:160,H1:40,A1:40,B1:320  O1:40,H1:320,A1:320,B1:320  
O1:40,H1:40,A1:40,B1:40  O1:80,H1:160,A1:40,B1:40  O1:160,H1:160,A1:320,B1:40  O1:160,H1:40,A1:40,B1:320  O1:40,H1:320,A1:320,B1:320  
O1:80;H1:160;A1:40;B1:40  O1:40;H1:40;A1:40;B1:40  O1:160;H1:160;A1:320;B1:40  O1:160;H1:40;A1:40;B1:320  O1:40;H1:320;A1:320;B1:320  
O1:40,H1:40,A1:40,B1:40  O1:80,H1:160,A1:40,B1:40  O1:160,H1:160,A1:320,B1:40  O1:160,H1:40,A1:40,B1:320  O1:40,H1:320,A1:320,B1:320  
O1:80;H1:160;A1:40;B1:40  O1:40;H1:40;A1:40;B1:40  O1:160;H1:160;A1:320;B1:40  O1:160;H1:40;A1:40;B1:320  O1:40;H1:320;A1:320;B1:320  
O1:80;H1:160;A1:40;B1:40  O1:40;H1:40;A1:40;B1:40  O1:160;H1:160;A1:320;B1:40  O1:160;H1:40;A1:40;B1:320  O1:40;H1:320;A1:320;B1:320