For performing an autosum in Excel for the values you have in the cells above active cell or the values in the cells from the left, you can use the shortcut key Alt + =. When you press the shortcut key it inserts sum function in the active cell by referring to the range that’s above or on the left side.
Alt + –
Now as I said, you can also insert an autosum in excel for values that we have on the left side.
But if you have values on the left side and also above the active cell, it will insert an autosum further about values. There’s one more thing when you press the shortcut key, it insert the function, but you need to press enter to get result.