write 1.5 billion as a standard numeral

1,500,000,000

To write 1.5 billion as a standard numeral, you can simply write it as 1,500,000,000.

Here's how you can break it down:

1 billion is equivalent to 1,000,000,000. To convert the decimal fraction 0.5 into a whole number, you can multiply it by 1 billion. Since 0.5 multiplied by 1 billion equals 500,000,000, you add this to the value of 1 billion. Therefore, 1.5 billion is written as 1,500,000,000.