①20﹣5.44﹣4.56
②2.4×1.01
③1÷[(+)÷11]
④×16.31﹣2.31
①2.65×1.7+7.35×1.7
②36×( + )
③54.2- +4.8-1
④0.7÷[( - )×24]
①26×15﹣200
②8×4×12.5×0.25
③×+
④12÷[()×]