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)
6-3= 5-3= 6-6= 8-1= 9-1= 10-4=
8-4= 9-5= 5-5= 3-3= 7-7= 8-7=
9-4= 8-2= 9-7= 4-4= 10-5= 4-2=
8-5= 10-3= 9-3= 10-7= 7-5= 6-4=
7-4= 6-0= 5-2= 10-9= 10-8= 8-2=