Question

Two hundred billion four hundred million expanded form

Answer 1

A billion is a thousand million.

A billion looks like this: 1,000,000,000

So 200 billion looks like this: 200,000,000,000

Four hundred million looks like this: 400,000,000

So what had you asked for?

200,400,000,000. That's an awful lot of digits. If you had this amount of money in pounds, you'd be the richest person in the world by a country mile.

Answer 2

200,400,000,000= 200,000,000,000+400,000,000
Hoped I helped:D