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Add Up (Sum) Entire Columns or Rows in Excel To sum columns or rows at the same time, use a formula of the form: =sum (A:B) or =sum (1:2) Remember that you can also use the keyboard shortcuts CTRL + SPACE to select an entire column or SHIFT + SPACE an entire row
Summation Symbol (∑) In math, the summation symbol (∑) is used to denote the summation operation, which is a way of expressing the addition of a sequence of terms