脱式计算（用你自己喜欢的方法）.
(1)1.12+1.79+8.88+0.21                        
(2)73.2﹣16.3﹣3.7
(3)99×3.6+3.6                                
(4)7.9×0.8×0.125
(5)4×8.8×0.25                                
(6)0.36×101．