In this unit, you will solve problems where you must decide if you need an estimated answer or an exact answer. You will also decide if the answers are reasonable for the problem.
You will also learn to write and compute numbers in scientific notation. When exploring in science, numbers are either very small or very large such as 10 million miles or one billionth of an inch. It is difficult to write these types of numbers on paper or enter them into a calculator or computer because they have so many digits. There is a better way to write the numbers and that is scientific notation.
Overestitmation (02:09) 
