What is the formula for horizontal summation?

Is July 8, 2012 regular? If regular, you can directly click the [sum] under the [start] tab. After the sum, you can directly double-click the lower right corner of the cell to automatically fill in the supplement: 1. For the vertical sum formula of Excel, first select the cell where the sum is located, and then enter: = sum (C2: C8) in the FX column above, C2 stands for the start cell, C8 stands for the end cell. The above function is to calculate the sum of Du Xiao. If the calculation is clever, it is: = sum (C9: C18) carriage return, it can be added: Excel horizontal summation formula, directly select all the tables to be summated, select an empty white box, and then click auto summation, the result will be output in the blank

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