①234+457+209
②39+3×9
③200-360÷9
④830-(456+128)
⑤649-(832-563)
⑥56÷(50-42)
302+303+304+305+306
=( )×( )
=( )
①(3618÷18-145)×20
②6÷ - ÷6
③(21+ )× +
④ ×[ ÷( - )]
⑤3.5×98+35×0.2