37.49-(3.15+5.49)=37.493.155.49
①4.26+3.56+5.7
②15.8-3.9-6.3
③6.1-5.78+3.59
④8.5+6.52-7.06
⑤15.38-5.38-4.2
⑥1.45+2.4+3.27