Select the cell where you want the average to appear
Type `=AVERAGE(`
Select the range of cells you want to average
Type `)` and press Enter
Example: `=AVERAGE(A1:A10)`
To average non-adjacent cells, use commas between cell references
Example: `=AVERAGE(A1,A3,A5)`
To average a row, select the row range
Example: `=AVERAGE(1:1)`
To average a column, select the column range
Example: `=AVERAGE(A:A)`
Use the AutoSum drop-down and choose Average
Check that the cells contain numbers, not text
Use `=AVERAGEIF()` to average cells that meet a condition
Use `=AVERAGEIFS()` to average cells that meet multiple conditions