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)
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)