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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.
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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.