Video Transcript
Three plus one equals what?
To find the answer, we need to add one to three. We can start with three and then add on one more. What is one more than three? Let’s use a number line to find the answer. Start on three and then count on one more: three, four. The number we’ve counted up to is four. Four is one more than three. We have four counters: three, four. Three plus one equals four.
