To write 1.4 billion in number form, you simply write it as 1,400,000,000.
Here’s a breakdown of how this number is formed:
- 1 billion is equal to 1,000,000,000.
- Adding 0.4 billion (which is 400,000,000) to 1 billion gives you 1,400,000,000.
So, 1.4 billion in number form is 1,400,000,000.