1. (2019五上·安溪期中) 计算下面各题，能简算的要简算。

①0.15×3.6-0.05

②2.4×0.19+2.4×0.81

③32×1.25×2.5

④4.5+5.5÷10

⑤2.05÷0.82+33.6

⑥8.67×7.9+86.7×0.21