How to use Scientific Notation
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How to use Scientific Notation
When working with scientific notations, what are some rules when it comes to multiplying and dividing them? Especially when it comes down to the exponents.

 Posts: 61
 Joined: Wed Sep 30, 2020 10:01 pm
Re: How to use Scientific Notation
When multiplying two numbers in scientific notation, multiply their coefficients and add their exponents. When dividing two numbers in scientific notation, divide their coefficients and subtract their exponents. If you remember from math where we were taught how to multiply and divide with exponents, the same rules apply to this case as well. Just make sure that after you multiply or divide to reconvert it to scientific notation.

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Re: How to use Scientific Notation
Also, when multiplying and dividing numbers in scientific notation, make sure that your answer has the correct number of significant figures. Your answer should have the same number of sig figs as both values. However, if both values have a different number of sig figs, your answer should have the least amount of sig figs. For example, (2.0 x 10^2) x (3.00 x 10^2) = 6.0 x 10^4 since the least number of sig figs is 2.

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 Joined: Wed Sep 30, 2020 10:11 pm
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Re: How to use Scientific Notation
They multiply and divide normally. For mw personally, it may be a little more work but I take the terms out of their scientific notation and multiply/divide normally, then put my answer back into scientific notation with the correct number of sig figs. This helps me make sure that I am doing it correctly. I hope this helps!

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 Joined: Wed Sep 30, 2020 10:00 pm
Re: How to use Scientific Notation
I also do what Kristina does, in the sense that I take them out of scientific notation to divide/multiply. This just helps me make sure I am multiplying and dividing correctly and and overall gives me a piece of mind that I am messing up my calculations here.

 Posts: 55
 Joined: Wed Sep 30, 2020 10:06 pm
Re: How to use Scientific Notation
Kelly Tran 1C wrote:Also, when multiplying and dividing numbers in scientific notation, make sure that your answer has the correct number of significant figures. Your answer should have the same number of sig figs as both values. However, if both values have a different number of sig figs, your answer should have the least amount of sig figs. For example, (2.0 x 10^2) x (3.00 x 10^2) = 6.0 x 10^4 since the least number of sig figs is 2.
Thank you Kelly, that really helped. I understand now!! :D
Re: How to use Scientific Notation
AdilaAhmed2L wrote:When multiplying two numbers in scientific notation, multiply their coefficients and add their exponents. When dividing two numbers in scientific notation, divide their coefficients and subtract their exponents. If you remember from math where we were taught how to multiply and divide with exponents, the same rules apply to this case as well. Just make sure that after you multiply or divide to reconvert it to scientific notation.
Thank you so much! This really made more sense after reading this!

 Posts: 56
 Joined: Fri Oct 02, 2020 12:16 am
Re: How to use Scientific Notation
AdilaAhmed2L wrote:When multiplying two numbers in scientific notation, multiply their coefficients and add their exponents. When dividing two numbers in scientific notation, divide their coefficients and subtract their exponents. If you remember from math where we were taught how to multiply and divide with exponents, the same rules apply to this case as well. Just make sure that after you multiply or divide to reconvert it to scientific notation.
Thank you so much for this! I sometimes get confused by this!!

 Posts: 57
 Joined: Wed Sep 30, 2020 10:04 pm
Re: How to use Scientific Notation
This link has some super clear and concise examples on when and how to use scientific notation that I found to be helpful, as it can be easy to be confused on this topic! https://calcworkshop.com/exponents/scientificnotation/

 Posts: 60
 Joined: Wed Sep 30, 2020 9:38 pm
Re: How to use Scientific Notation
AdilaAhmed2L wrote:When multiplying two numbers in scientific notation, multiply their coefficients and add their exponents. When dividing two numbers in scientific notation, divide their coefficients and subtract their exponents. If you remember from math where we were taught how to multiply and divide with exponents, the same rules apply to this case as well. Just make sure that after you multiply or divide to reconvert it to scientific notation.
Thanks Adila! This was a super helpful comment and really gives a quick method for all of us to calculate values in scientific notation. I did not think about this in the way you explained so it was pretty eyeopening.
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