### Worksheet # 1 - Answers on 2nd Page of PDF

There are ten worksheets that require the multiplication of decimals and using powers of ten and exponents. This type of activity can be done easily on a calculator. However, students should be able to understand the concept in order to know how to key the exercises into a calculator. This type of concept is a pre-algebraic concept required usually by the seventh or eighth grade. Once students are comfortable with powers of ten calculations (10^{2} = 100, or 10^{3} =1000 and so on and so forth). Once a student understands the number of the power or scientific notation, they continue on with the rest of the calculation.

I was once asked how many questions need to be done before it's felt that a student understands the concept. Tricky question because as you're teaching the concept, it may appear the student has a strong grasp of it. However, come back to that concept 6 months later and sometimes, the concept is forgotten. I would say, provide a variety of question types, varying the numbers and look for accuracy and fluency. Once few errors are being made in an acceptable amount of time, consider the student in the know!