Trang chủ » Hỏi đáp » Môn Toán A=1999 x 2011 – 1999/2010 x 1998 -2010 09/06/2023 A=1999 x 2011 – 1999/2010 x 1998 -2010
A = ( 1999 xx 2011 – 1999 )/( 2010 xx 1998 – 2010 ) => A = ( 1999 xx 2011 – 1999 xx 1 )/( 2010 xx 1998 – 2010 xx 1 ) => A = ( 1999 xx ( 2011 – 1 ) ) /( 2010 xx ( 1998 – 1 ) ) => A = ( 1999 xx 2010 )/( 2010 xx 1997 ) => A = 1999/1997 Vậy : A = 1999/1997 Trả lời
A=(1999xx2011-1999)/(2010xx1998-2010) =(1999xx2011-1999xx1)/(2010xx1998-2010xx1) =(1999xx(2011-1))/(2010xx(1998-1)) =(1999xx2010)/(2010xx1997) =1999/1997 Trả lời
