You can subtract in Excel by placing a minus sign in front of any numbers you want to deduct. You can add and subtract a bunch of numbers at once using the equal sign or SUM function.

Adding a new column to either an entire spreadsheet or just a portion is an easy thing to do in Microsoft Excel. Here's how.

Subtracting isn’t as straightforward in Excel as it seems, simply because there’s no actual command to subtract numbers. Instead, you have to use a formula with the subtraction operator.