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Love this idea, especially since my son has such a hard time with math. Although I wish there was a more "manlier" way to do it. :-)
I'm sorry, but I think this is an awful method to teach addition and subtraction. When students get into highschool, they do not understand that in order to operate with fractions, they have to add or subtract in the "same family", halves with halves, thirds with thirds, and so on. So please, be careful!!!! :)
I teach HS math and I agree that it's important to to have a strong understanding of fractions and common multiples. But I am going to show this to my Algebra 2 class because I am always telling them how cool numbers are in the many ways they relate! Just for fun!
Man, I wish they taught it this way when I was learning fractions. It's so easy and fun.
@Rachel Nau... We could use the first part for comparing fractions. I agree with the comments about common multiples but comparing fractions is SUCH a HARD concept to 3rd ELLs (ESL) and I need something they can use for standardized testing!
The most important thing to teach is that there are many ways to solve problems ... nice example of a cute one.
After making a student understand the concept of common denominator this is a fun way of rounding up the topic by showing them a short cut....I love short cuts and I use them whenever I can. Its like the icing on the cake.
You r nuts!!!!!
Wish I knew this before FCAT!
What a creative way!
friggin hate fractions lol
@Kimberly Smith and @Anthony Wallace here you go some of that new math
I still have some kiddos that don't get adding and subtracting fractions ... it's another way of doing it, gonna show it to them and see if any of them understand it with this method!?
I homeschool and I love the fun side of this theory, but it is dangerous to use it as an exclusive means to solving fractional equations. They WILL need to know how to determine common denominators later in school. Another danger, that would apply to my son, is if he thought he knew a short cut he would apply it all the time, even for problems that would need done the traditional way. He will do anything to make his math "easier", hence he would only remember the "short cut". I'm no mathematician; I too struggle with, but the simpler way would make it more difficult later. I agree it could be used after fractions are mastered as a quicker solution.
Always good to have several strategies on hand for someone who just doesn't quite understand
I don't think you do any favors by teaching a trick without the real understanding. And, it takes repetition, again and again.
It reminds me of my school days.
Fractions on a number line- good visual
Adding and subtracting fractions!
Adding & Subtracting Fractions!
An alternative method for adding and subtracting fractions with different denominators.
A fraction is:
Butterfly method for adding subtracting fractions. How have I never heard of this?
Waldorf ~ 4th grade ~ Math ~ Fractions ~ art