能简算的要简算：
①9.1﹣1.2÷6﹣6.24      ②4.7×10.2             ③0.88×4.9+0.88×5.1
④2.5×8×0.4×0.125     ⑤（5.63﹣1.88）×0.2    ⑥0.25×43.7×4．