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Course: 6th grade foundations (Eureka Math/EngageNY)>Unit 1

Lesson 1: Topic A: Foundations

Understanding fractions as division

Sal shows how a/b and a÷b are equivalent. That is, the fraction bar and the division symbol mean the same thing. Created by Sal Khan.

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• so we can do division or multiplecarion
• division is what were supposed to do
• If you still don't understand how to divide fractions. I will show you. There are 3 steps.
So say you were doing 1/3 divided by 6 or 6 divided by a third.
We will do 1/3 divided by 6 first.
Step 1: Keep the number 1/3
Step 2: Switch the division symbol to multiplication
Step 3: Find the reciprocal of 6. And its 1/6 so 1/3 times 1/6 is 1/18. Sometimes you need to simplify.
Now 6 divided by 1/3
Keep 6.
Turn to muliplication
Switch 1/3 to 3/1
its easier as 6/1x3/1 and that's 18/1 which can be reduced to 18
Hope this helped
• Bruh what I want to know is how to divide a fraction with a fraction that has a different denominator.
• just anotha day of khan making things complicated FOR NO REASON💯🔥🗣🙏
• Any tips? I would love that please! I still cant do it myself.
• Swap the numerator and the denominator, (the top and bottom numbers in a fraction) on the second fraction. WHATEVER YOU DO, DO NOT DO IT FOR THE FIRST FRACTION. For example, 1/2 x 3/9, so it would be re-written as 1/2 x 9/3, and then you just multiply it, which would be 9/6, and then, you divide the numerator by the denominator, so just think, "how many times can 6 go into 9? And how much is left over?" So, if you were to do that, the answer would be 1 3/9, which, by the way, was you second fraction that you swapped. And, if you know how to, then you would simplify, and your final answer would be 1 1/3. (Oh, and by the way, the word for swapping the numerator and the denominator is called recipricals. So if you ever see that word in a test or a math question, then you know what it is.
• can we always do divison
• Any two real numbers can be divided, to get a real number, except that we can’t divide by zero.

Have a blessed, wonderful day!
• but what if we need to divide it
• when it says 5 millimeter can fit in a bottle of perfume how do you answer it when it says how many 2 millimeters can fit in there it is too R one how do you write that so that i dont get the answer wrong again and again.
• You’re right that one way we could write the answer to that problem is 2 R 1, but this lesson is focusing on fractions in division. How can we represent the answer with a fraction instead?

We could use an improper fraction, 5/2. We could also use a mixed number, 2 1/2.

Does that help?
• KFC method