3000-45-72-63-81-55-37-28-19
①18×25×40
②0.25+0.85+1.75+2.15
③95×102
④126×8+8×74
⑤15×4×25×6
⑥99×57
①5.6+12.85-9.76
②16-8.49+5.19
③14.68-0.56-6.44
④14.68-9.68+7.4
⑤14.68-(9.68-7.4)
⑥2.43+3.34+6.66+2.57
①×4.5+6.5×80%﹣0.8
②4×0.8×25%×12.5
③[﹣(﹣)]÷
④2022×