In Nigerian folklore,

someone called out to a young child, "Emeka what is four plus four?"

The child, frowning, said "eh, I don't know."

The same person asked, "Emeka, what is four naira plus four naira?"

The kid proudly announced, "ahahn, that na eight naira now!"

I think Seun told me this joke.

Let's learn matrix multiplication. Can you solve this?

If you're like Emeka, think of the above matrix multiplication as:

If you can write in matrix form all your:

eggs from two shops, milk from two shops, and sugar from two shops in three columns,

then you can do the following matrix multiplication:

someone called out to a young child, "Emeka what is four plus four?"

The child, frowning, said "eh, I don't know."

The same person asked, "Emeka, what is four naira plus four naira?"

The kid proudly announced, "ahahn, that na eight naira now!"

I think Seun told me this joke.

Let's learn matrix multiplication. Can you solve this?

If you're like Emeka, think of the above matrix multiplication as:

If you can write in matrix form all your:

eggs from two shops, milk from two shops, and sugar from two shops in three columns,

then you can do the following matrix multiplication: