①475+390÷13-123
②270÷1.25÷0.8
③6.5÷ ×
④24×( + - )
⑤
⑥ ×47+52÷ +0.375
75×22
①63.7﹣5.8﹣4.2
②×+÷11
③(++)×24
④5.96×[1÷(2.1﹣2.09)]