Why Do We Need a Common Denominator When Adding and Subtracting Fractions? | Math with Mr. J

Welcome to “Why Do We Need a Common Denominator When Adding and Subtracting Fractions?” with Mr. J! Ever wonder why we need common denominators when adding and subtracting fractions? You're in the right place!

Whether you're just starting out, or need a quick refresher, this is the video for you if you're looking for help with common denominators. Mr. J will go through an example of adding fractions to show why we need common denominators and explain why common denominators are needed when doing things like adding fractions, subtracting fractions, comparing fractions, and ordering fractions.

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Hopefully this video is what you're looking for when it comes to why we need common denominators when adding and subtracting fractions.

Have a great rest of your day and thanks again for watching! ✌️✌️✌️

✅ Thanks to Aloud, this video has been dubbed into Spanish and Portuguese. #DubbedWithAloud

English

Spanish

Portuguese

[MathwithMrJ]

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[andreap]

Just wanted to say thank you for all you do, and your easy to understand content . I finally passed the math portion of the GED yesterday and it was because it all finally made sense after studying with your videos . Thank

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this channel is the only thing helping me pass my ged math assessments

[cdsmi]

This is helping my daughter pass her 5th grade math tests.Thank you for your work and keep going!

[saiyakshaashreer]

Iam 66 years old I forgot all the maths how iam going to teach my grand daughter thank god I was saw yr video now I am free from that issue so many thanks for u god bless u

[Journeymannic]

WOW super clarifying, please twine WHY do we need to simplify the final result of fraction operation?

[jhuncoloma]

Thank you so much Mr J! Because of you, i became top 1 in math! You really are my idol 🤍😁

[hamannlaura]

This is a beneficial video! The only thing is that your ending visuals are 3/8. Yes, I understand the why and how, but you may want to change it to only 4 blocks for the last step (since there is now a common denominator, it eliminates the extra set of 4). Thank you for your videos!

[zeynaviegas]

that is so beautiful oh my god thank you!

its funny how the basics of why the operations happens are never taught in an efficient manner in school.

im almost finishing my graduation in physics, and i have already mastered most of calculus, yet this video managed to blow my mind.

[_iamunknown_]

Very easy to understand when u explain

[hbaesthetics]

Simple and straight forward. Thank you!

[Mistifyzx]

Thank you so much Mr. J I wish u were my teacher

[kflow]

I like what you said at the end about the measurements that really helped put it into perspective

[nanam.]

This is really good son did this during class. Understood better then the class🎉

[CharuTrivedi]

Thanks sir you give me answer of my why in this video ♥️💐

[StasijaProsperity]

This guy goood, it helped thank you✌🏽

[OwangeZenGaming]

The one guy who actually helps u with ur work 😁

[notu]

The best way to think about this, at least for me, is to think about fractions as simply an expression that can change in forms but will always have 1 decimal form, e.g., 3/4 can have a different fractional expression like 6/8, but will always equal to the decimal answer, 0.75. So, by adding fractional expressions, we are essentially adding decimal numbers together. If the fractional expression does not represent its original decimal number, it means that it is a totally different thing (e.g., 1/2 is not logically equal to 4/4).

[lxmidbst]

I have a question, did you ever make a video about subtracting and then adding common denominators if yes can you put a link here. thank you

[kirkjumpp]

how would you find the common denominator for adding 3/8 + 4/9 + 6/7