(1)(0.02+28.16÷32)×0.1(2)2.6×0.26+8.4×0.26﹣0.26(3)2.5÷[(17.2﹣4.5×3.6)÷0.04](4)已知:a=0.26、b=0.3、c=26,求:c×(b﹣a)的值.