One answer: sometimes you need a name, especially because there’s more than one of them. Suppose you’re looking for one digit numbers like this: 10•_ + _

One answer: sometimes you need a name, especially because there’s more than one of them. Suppose you’re looking for one digit numbers like this: 10•_ + _ = 73 Now try saying the answer: “7 and 3”. This gets vague quite quickly —- which blank is 7 and which is 3?