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## 4th grade (Eureka Math/EngageNY)

### Unit 3: Lesson 1

Topic A: Multiplicative comparison word problems- Comparing with multiplication: magic
- Compare with multiplication word problems
- Comparing with multiplication and addition: money
- Area & perimeter word problem: table
- Area & perimeter word problem: dog pen
- Comparing areas word problem
- Represent rectangle measurements
- Area & perimeter of rectangles word problems
- Area and perimeter situations

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# Comparing with multiplication: magic

Sal solves a multiplication comparison word problem with Harry Potter characters. Created by Sal Khan.

## Want to join the conversation?

- what is the fastest way to get energy points(8 votes)
- Watch a viode(2 votes)

- can someone explain why they did it in a harder and longer way then just doing it quick and easy you could have just done 7x5 and you would get 35 and you know it would be 7(7 votes)
- To help you later on.(1 vote)

- why did you say the same word twice(4 votes)
- so you can remeber(3 votes)

- Did anyone else notice that he said Hermione wrong the first time? I did!(5 votes)
- When we learn a harder division how can this even help?!(4 votes)
- You will still need to do normal dovision(2 votes)

- can you multiply negative numbers with word problems(4 votes)
- Why I can’t hear the video?(4 votes)
- i wonder how bad you'd have to be at math to not understand this easiness i am in the second grade and this stuff it incradibly esaly(4 votes)
- the answer is 6(4 votes)
- oh my gosh this can be explaned so simply but they make it sound complocated.and WHAT MaGiC??(1 vote)

## Video transcript

Ron and Hermione are
practicing lifting feathers into the air with magic. Hermione can lift a feather
35 feet into the air, which is 5 times as high as
Ron can lift a feather. How high can Ron lift a
feather with his magic? So Hermione, this 35 feet
is 5 times more than Ron. So to figure out
what Ron can do, we just take what Hermione
can do and divide by 5. So what's 35 divided by 5? Well, 5 times 7 is 35. So 35 divided by 5 is 7. So Ron can lift a feather
7 feet in the air. So let's check our answer. Now, if you have trouble
with this-- and we could also look at
the hints for this. So they show that Hermione can
lift a feather 35 feet, which is 5 times higher than Ron. So this could be the length
of how high Ron can raise it. And so, if you were
to actually divide 35 into 5 equal sections,
so 5 times question mark is 35, that's the same thing
as saying 35 divided by 5 is question mark. And 35 divided by 5 is indeed 7.