Combining · 4 of 13

Subtraction does two jobs

The same dash either removes, or measures the gap.

Why this exists

Sometimes you eat some of the apples and you want a name for what’s left. Sometimes you didn’t eat any. You only want to know how many more sit in one basket than the other.

Those are different stories. They use the same mark. A lot of confusion is just not knowing which story you’re in.