专项训练试卷怎样算简便就怎样算。(1)( )( ) (2)(1009)( )(3) 1 1 (4) (5)( ) (6) ( ) (7) 62.5%30.6257 6 (8) (9) (10) ( )(11)(17 17)34 (12)( 75%)0.25
