简便计算. (1)4.52﹣0.74﹣0.26 (2)0.42+5.4+1.58+2.6 (3)4.8×99+4.8
10-÷×1
325×0.36+6.75×36
5.6×0.375+×5.4-0.375×0.9
5.6x+4x=17.28
x+=