You would write it like this 21 or 2.1*10^1.
20,000,000,000,000,000,000,000
21,000,000
It is already in standard form.
In its simplest form 525/1000 = 21/40
15,021,000
You would write it like this 21 or 2.1*10^1.
2.0*1021 is already in standard form!
0.00021
63,021,002
It is 8.021
20,000,000,000,000,000,000,000
hundred thousandths = 1/100,000 → 4 and 21 hundred thousandths = 4 21/100000 = 4.00021
21,000,000
It is already in standard form.
15,021,000 its easy all you do is out 21 at the end put a zero in front of it.
Twenty-one million, two-thousand nine-hundred fourty-three.