Unit Conversion Word Problems

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@Greenemath 3 жыл бұрын

Step-by-Step Computer Generated Practice Test: www.greenemath.com/Pre-Algebra_Practice/Converting_Between_US_Units_Practice/Converting-Between-US-Units.html Practice Test: www.greenemath.com/Prealgebra/47/ConvertingUSUnitsPracticeTest.html

@internetgrudge1374 4 жыл бұрын

It's been 9 years and he is still liking the comments

@Greenemath 4 жыл бұрын

I've been catching up, back then you had to go to each video for comments, now you can get all of them in one place :)

@darkrising8280 2 жыл бұрын

I didn't pay attenion attenion in pre alg, so comming back having to know this for chem and the SAT's thanks alot!

@Greenemath 2 жыл бұрын

You are welcome, good luck with the test!

@LojoSports 4 жыл бұрын

We do ours in chemistry class not algebra. This is really helpful though since our teacher doesn’t explain it

@Greenemath 4 жыл бұрын

Oh that's cool, I don't remember chemistry at all, that was a long time ago. Good luck with your class, I hope you get a good score! :)

@HiHi-rs8li 4 жыл бұрын

you helped me so much

@Greenemath 4 жыл бұрын

Glad to hear it! :)

@dthwish6431 11 жыл бұрын

thanks :) i learned a lot from this vid :) thumbs up and keep posting more of this it really helps me a lot . P.S you should be my teacher in physics from now on LOL

@Greenemath 4 жыл бұрын

Glad to hear the video was helpful! :)

@carzyscenctist 3 жыл бұрын

Answer this question for me, please, is a head scratcher: 1.0 cubic centimetre (cm^3) of a solution contains 0.010g of salt. What is the mass of salt contained in 1 cubic decimetre (dm^3) of the same solution? Textbook says 10g but I disagree, my answer is 0.1g Which answer is correct and Why?

@Greenemath 3 жыл бұрын

What are your steps and what textbook are you using?

@carzyscenctist 3 жыл бұрын

@@Greenemath My steps are: 1.0 cm^3 has 0.010g 1*10^-2m^3 has 0.010g 0.01m^3 has 0.010g therefore 1m^3 has 1g meaning 10^-1m^3 has 0.1g = dm^3 has 0.1g It can't be 10g. Try it like ten times still get that answer, maybe the textbook answer is wrong, idk or my steps are wonky. The textbook name: Chemistry by Rob Lewis and Wynne Evans, Fifth Edition Publisher: Palgrave Question: Excerise 1C (ii)

@Greenemath 3 жыл бұрын

@@carzyscenctist Here is what I am thinking. When you talk about a decimeter versus a centimeter, we are talking about an amount that is 10 times larger. When we think about things being cubed now, we would think about this as being 1000 times larger (10^3). So here, my understanding would be if they had the same solution and a 1000 times larger amount of it, how much is the mass. So I would just do .01 * 1000 = 10. I haven't taken chemistry in such a long time that I am unfamiliar with that type of problem. I think that's what they did to get a solution.

@carzyscenctist 3 жыл бұрын

@@Greenemath Thx so much

@Greenemath 3 жыл бұрын

@@carzyscenctist You are very welcome.

@Halinawithani 4 жыл бұрын

My teacher didn’t even explain it she just gave us a worksheet and told us to do it...

@Greenemath 4 жыл бұрын

Are they unit conversion problems?

@darinheight6293 3 жыл бұрын

in the first problem just multiply $3.25 times 4, then multiply that by 500 and subtract $750. Same sequence for the second problem. No offense GreeneMath but, you make it more difficult than it has to be.

@Greenemath 3 жыл бұрын

Although what you mention is faster, you would need to know there four quarts in a gallon. Since this is about unit conversion word problems, I took the time to explain the conversion step. If I showed it the way you mentioned above, all of the comments would be "where did you get the 4 from".

@darinheight6293 3 жыл бұрын

@@Greenemath agreed sir. But by the time a person gets to this level math, I’m sure they know that there are four quarts in a gallon. Kids learn the metric stuff in elementary school now.

@Greenemath 3 жыл бұрын

@@darinheight6293 Most of the people who watch these videos are from foreign countries and have no idea what a pint, quart, or gallon is, they use the metric system. Math videos will never be a one size fits all, everyone comes in with a different level of knowledge.

@darinheight6293 3 жыл бұрын

@@Greenemath while that may be true, when it comes to math the majority of people outside of this country has a better understanding of math then we do, so what you’re saying about foreign countries is not valid.

@Greenemath 3 жыл бұрын

@@darinheight6293 Math understanding is all over the place. Even here in the U.S. some places do really well, they teach algebra in the 6th grade, while others are teaching algebra in 9th grade. There isn't a one size fits all for math. No matter how I make the video, someone will complain about it being too fast or too slow.