4/25(1/1*5+1/5*9+1/9*13.1/97*101)多少?

4/25(1/1*5+1/5*9+1/9*13.1/97*101)多少? 1,3/4,9/5,7/16,25/9,() 0,1,1,4,5,9,14,16,30,25? 5/9÷1/3-2/9÷1/3 (1/4+5/6)X24/25 1/1×5+1/5×9+1/9×13+1/13×17+...+1/25×29= 4/1*5+4/5*9+4/9*13+4/13*17+...+4/25*29 4/5*1+4/5*9+4/9*13+.+4/25*29=? 简算(5/9+1/25)*9+16/25 找规律1/2,4/5,9/13,16/25,( ),( ) 1/4x^2-3/5x+9/25 1.25×8/9+5/4*1/9 5/9-1/25+4/9-4/25=?简便计算 1,5,9,13,(),21,25 找规律 1,3,5,7,9,_____,...,_____,... 1,4,9,16,25,____,...,_____,... （32*1/4+17）÷5/12 （25+3/4）÷1/4+1/4 18/25×9/16+7/25*9/16+9/16 1/4,3/9,5/16,7/25,9/36,第9个数该是多少 有理数:25/|[7/2-(-9/4)-1/3-1/4-(+1/6)]*(-5)= (25/88-5/108+5/144)*(9/25-1又4/5)