3.87 x10^12
It is: 387 = CCCLXXXVII
10, 014, 387
387.Standard notation is our regular system of writing numbers. So, 387 is already in standard notation! Other kinds of notation include scientific notation and expanded notation.
0.387 = 387/1000
I write 620 billion as 620 billion.
3,000,387
It is: 3.87*10^2
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
40,300,000,000
24 and 3/16
As a number it is: 1,800,000,000 = 1.8 billion