CAN GAP NHA d ) 3 . ( x + 1 ) + 2 . ( x + 2) = 5 e) 5 . ( x+ 6) + 6 . ( x+ 1 ) = 47 f ) 8 . x - 100 . ( 20 + 5 ) = 4 g ) 9 . x + 2 . ( 100 -98 ) = 4 BAI 2 TINH NHANH A = ( 44 . 52 . 60 ) : ( 11. 13 . 15 ) B = 123. 456456 - 456 . 123123 C = ( 98 . 7676 - 9898 . 76 ) : ( 2001 . 2002 ... 2010 )

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