计算．（怎样简便怎样算）．
5.64﹣2.4÷0.48                12.8+10.8÷45            13.2÷8÷1.25
（70.8﹣67.55）÷0.25          1.63+4.19+2.37           2.16×5.6+4.4×2.16．