MS Excel
The auto calculate feature

Provides a quick way to view the result of an arithmetic operation on a range of cells
A and C
Can only add values in a range of cells
Automatically creates formulas and adds them to a worksheet

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MS Excel
You can select a single range of cells by

Pressing the Ctrl key while dragging over the desired cells
Dragging over the desired cells
Clicking the upper-left cell in a group of cells and then pressing the Shift key while clicking the lower right cell in a group of cells
Pressing the Shift key and an arrow key

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