Insert a SUM AutoSum formula
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ALT=
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ALT+
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ALT-
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CTRL + ALT
A
Correct answer
Explanation
The shortcut ALT + = (holding Alt and pressing the equals key) inserts a SUM AutoSum formula in Excel. This automatically selects the range of cells above or to the left of the current cell and inserts the SUM function, making it quick to add up columns or rows of numbers.