×34×17× ×12 ×+
2023× ×+ ×99+
① ②
③ ④
9×+÷9
×48
①21÷0.5÷0.6
②125×88
③2.5×32×12.5
④
⑤
⑥61×40%+38× +0.4
① ×
②3÷( × )
③1- ×
④ ×( )
⑤ × ×
⑥ ×[ ÷( )]