计算下面各题. (1)2.89×6.37+0.137×28.9+289×0.0226; (2)1+2+3+4+5+6; (3); (4)(5﹣1.8)÷[(1.15+)×1]; (5)+++…+(答案写成最简形式即可)
15.8-(6+÷12.5%)
10-÷×1
325×0.36+6.75×36
5.6×0.375+×5.4-0.375×0.9
5.6x+4x=17.28