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3rd grade (Eureka Math/EngageNY)
Course: 3rd grade (Eureka Math/EngageNY) > Unit 5
Lesson 1: Topic A: Partitioning a whole into equal partsIdentifying unit fractions word problem
Lindsay solves a word problem by using a unit fraction. Created by Lindsay Spears.
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Fractions are just decimals right?(13 votes)
Fractions are statements where there is a number on top of a number, or a numerator on a denominator.
Decimals are non-whole numbers with a "." or decimal to indicate the moving of the number digits of the number into numbers with values smaller than one.So no.
But fractions can become decimals if you convert them to one.
You divide the top number by the bottom in the fraction to convert it into a decimal.(10 votes)
whats a denominator?(1 vote)
When you have a fraction like 3/4, the denominator is the bottom number in the fraction (the 4). The numerator is the top number in the fraction (the 3).(4 votes)
it is approaching at a rapid pace .
beware of it .(2 votes)
What would the answer in decimal be? Would it be 0.3?(1 vote)
No it it would be .33333 repeating forever(4 votes)
hmm you can pick any section ?(2 votes)- Is the answer 1/3?(1 vote)
why do we use fraction in real life?(1 vote)- Fractions are used in real life in many different ways, but they are most commonly used in the cooking, construction and science industries. Because fractions describe an object or substance that has been divided into different equal parts, fractions can be found almost anywhere.(1 vote)
At0:43what does Lindsay mean by sections?(0 votes)
Some plates have sections, like a cafeteria tray, for different foods. In this example, the plate having sections allow it to be divided into three perfectly equal areas, which is helpful as a fractions example. Each section is one third (1/3) of the plate, so when one is full of broccoli, 1/3 of the plate has broccoli. I hope this helps!(3 votes)
Do you need equal parts for every fraction model and why? How will that make things easier for us?(0 votes)- Having a fraction implies equal parts exist. You could divide anything into 3 randomly sized sections, but then each section would be a different size. Filling one section with broccoli would just mean one section was full of broccoli. Dividing the whole (in this case, the plate) into equal sized sections means that you can describe the sections in relation to the whole thing. Each of the three sections is exactly equal to the others, so each section is exactly 1/3 of the whole. This lets you see things more easily. Otherwise, filling one section with broccoli could cover any amount of the whole plate -- and depending on which section was filled, the answer would change.(2 votes)
0:43Video transcript
- [Voiceover] This question
says, Vera's dinner plate is divided into three
equal-sized sections. Vera puts all her broccoli in one section. And then we're asked, what fraction of Vera's plate has broccoli? Okay. So we have we plate with
three equal-sized sections, and we know that Vera puts
broccoli in one section, and we're asked to
figure out what fraction of the plate that is. So we can draw Vera's plate, try to represent this with a picture. Maybe Vera's plate is a rectangle. We don't really know,
but a rectangle will work as long as it has three
equal-sized sections. So let's try to draw that. This may not be perfect. We can probably do that
second one a little better, but this should represent
three equal-sized sections on a plate. And then we know she puts broccoli in one of those sections, so let's
use green, draw some broccoli. Broccoli, broccoli, broccoli. And then, look at this
picture, and ask ourselves, what fraction of Vera's
plate has broccoli? Well, our fraction's
gonna have a numerator. On top will be how many
sections have broccoli, which is one, and then,
our denominator will be out of the total number of equal sections, and we know there are
three equal-sized sections. So 1/3 or one of the three
sections has broccoli.