... 40 .8. 387 .6.412.53.2+40.2 487 .2453.24+= 2400100.24)4 087 53(24==+=0,5Câu 2: 2,0a) ( )2003 187 4x=+ 444745 18 5 187 43 182 0074===++=+xxxx0,5b) 12)23x (89 =+ 54x2377x7723x1 289 23x===+=+0,5c)( ... nhất:a) 6215911741 38 ++++b) 4.7.11 28. 1376. 28 ++c) ( ) ( )15.13.11:60.52.44d)40 .8. 387 .6.412.53.2+Câu 2: Tìm x, biết:a) ( )2003 187 4x=+b) ( )1223x89=+c) ( ) 183 6:72x=d) 1521:105x=Câu ... II: Tự luận 7,0Câu 1: 2,0a) 6215911741 38 ++++= = ( ) ( )=++++1171594162 38 100 + 200 + 117 = 4170,5b) =++4.7.11 28. 1376. 28 ( ) 280 0100. 281 11376 28 ==++0,5c) ( ) ( )15.13.11:60.52.44(...