how do you add, subtract, multiply, and divide numbers written in scientific notation
Scientific Notation is just an other way to write a number with a 10^x. U can add, subtract, multiply, divide this number as every other normal numbers, as the value doesnt change.
F.x. 1.2 * 10^3 is a scientific notation of the number 1200.
This is really helpful when numbers get large or have many decimals, specialy in physics.