用你喜欢的方法计算

①7.52-2.5+6.42

②60.8-7.18-12.22

③0.25×27.5×0.4

④3.5×2.3+1.46

⑤5.25×1.2-0.25×1.2

⑥1.87+0.26+6.13+1.74