Khan Academy

Supporting grades: 4

Description: Sal compares fractions with unlike denominators by drawing bars. So what I'm gonna do is I'm gonna have two copies of the same whole, so let me just draw that, but I'm gonna divide the first one, so this is one whole right over here, this rectangle, when we draw the whole thing. We have a rectangle of exactly the same size. We just divided them into different sections and you see that if you have four of the fifths, that that is going to be more than three of the fourths, and so 4/5 is greater than 3/4 or you could say 3/4 is less than 4/5, or any way you wanna think about it.

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