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# Scientific reteaching

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This is a reteaching file for students to view who are having difficulty with scientific notation.

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### Scientific reteaching

1. 1. Scientific Notation <ul><li>Re-teaching to Perfection </li></ul>
2. 2. POSITIVE EXPONENTS <ul><li>Mean you need to move the decimal to the right the number of spaces of the exponent </li></ul><ul><li>Mean you are multiplying by 10 “that many times” </li></ul><ul><li>Mean you are dealing with a large number </li></ul>
3. 3. Writing into Standard <ul><li>7.35 x 10 5 </li></ul><ul><li>There are 2 numbers AFTER the decimal </li></ul><ul><li>How many zeroes (if any) will you need to add? </li></ul><ul><li>Write the number in standard notation on your scratch paper, then go to the next slide. </li></ul>
4. 4. CHECK: <ul><li>735,000 </li></ul><ul><li>If you don’t understand at this point, stop and raise your hand. You need to ask your teacher and get some help. Don’t delay! It’s almost test day!! </li></ul><ul><li>7.35 x 10 5 </li></ul>
5. 5. Writing into scientific <ul><li>92,000,000,000 </li></ul><ul><li>You need a decimal x a power of 10 </li></ul><ul><li>Count the digits (numbers) after the first number. This is your exponent! </li></ul><ul><li>Write your number on scratch paper, then go to the next slide. </li></ul>
6. 6. check it: <ul><li>92,000,000,000 </li></ul><ul><li>9.2 x 10 10 </li></ul><ul><li>Please raise your hand and ask the teacher if you aren’t sure of how to get this answer. I WANT to help you! You just need to ask :) </li></ul>
7. 7. NEGATIVE EXPONENTS <ul><li>Mean you need to move the decimal LEFT </li></ul><ul><li>Mean you are really dividing by 10 the number of times as the exponent </li></ul><ul><li>Mean you are dealing with a small number, NOT a negative number (no negative distances/measures) </li></ul>
8. 8. into standard <ul><li>2.73 x 10 -7 </li></ul><ul><li>Remember you will move left 7 spaces. </li></ul><ul><li>There is already ALWAYS one number to the left of the decimal, so you will add ONE LESS zero than the exponent! </li></ul><ul><li>Write it on your paper and check it on the next slide. </li></ul>