① ×
②3÷( × )
③1- ×
④ ×( )
⑤ × ×
⑥ ×[ ÷( )]
①
②
③
①50× = ② × = ③12.4× = ④( )×35=
⑤ = ⑥9 = ⑦ = ⑧ =
④
⑤
⑥