The order of 1, - 1 / 2,1 / 3, - 1 / 4,1 / 5, - 1 / 6... Is as follows First line 1 Second line - 1 / 2 1 / 3 The third line - 1 / 4 1 / 5 - 1 / 6 The fourth line 1 / 7 - 1 / 8 1 / 9 - 1 / 10 The fifth line 1 / 11 - 1 / 12 1 / 13 - 1 / 14 1 / 15 ······ Please write down the process, steps and details of the 10th number calculation from left to right in line 20

The order of 1, - 1 / 2,1 / 3, - 1 / 4,1 / 5, - 1 / 6... Is as follows First line 1 Second line - 1 / 2 1 / 3 The third line - 1 / 4 1 / 5 - 1 / 6 The fourth line 1 / 7 - 1 / 8 1 / 9 - 1 / 10 The fifth line 1 / 11 - 1 / 12 1 / 13 - 1 / 14 1 / 15 ······ Please write down the process, steps and details of the 10th number calculation from left to right in line 20

﹙1+19﹚×19÷2+10=200
﹣1/200