Choose the actual number part in the number. These would be the significant digits.
Write that number with a decimal point after the first digit. Then multiply by a power of ten to push the decimal point back to where it should be.
Example
602 000 000 000 000 000 000 000 is a chemist's favorite number.
Take the actual number 602
Write with decimal point after first digit 6.02
Multiply by a power of ten to put the decimal point back. Look at the original number. There are 23 places after the 6 (including the 02) so multiply by 1023
6.02 x 1023
If the number is small like 0.000 000 023 456
23456 is the actual number
2.3456 has the decimal
seven zero's and the 2 are the places to move past. Notice the decimal will move left so the exponent is negative
2.3456 x 10-8
2.5162 × 102
1.73
You can write 10000000000 in exponential notation on a computer as 1.0e+10.
5730 in exponential notation is 5.73 x 10^3
The exponential notation for the number 80 is: 8.0 × 101 or 8.0E1
579.85 in exponential notation is: 5.7985 × 102 or5.7985E2
3.35777e+5
Negative numbers cannot be written in exponential notation. The rules require the number to be between 1.0-9.9.
2.5162 × 102
270.0 = 2.7 x 102 in exponential notation.
1.73
You can write 10000000000 in exponential notation on a computer as 1.0e+10.
40879.325 in exponential notation is 4.0879325 x 10^4
5730 in exponential notation is 5.73 x 10^3
5.907 × 10-4or5.907E-4
9.8552*104
The exponential notation for the number 80 is: 8.0 × 101 or 8.0E1