How Would You Visualize a Fraction Divided by a Fraction | Gamer Tech

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I hate “Maintain, Flip, Swap”. After we train college students tips as a substitute of quantity sense, the result’s typically that college students don’t perceive what they’re doing. In Jo Boaler’s Mathematical Mindsets, he says that arithmetic is “inventive and visible.” As an alternative of instructing tips, take into account having college students visualize and clarify the fraction. So how would you visualize a fraction divided by a fraction?

What does divide imply?

As an alternative of going straight into the principles for dividing fractions… that lots of people do not perceive… let’s take a while to consider division.

What number of methods are you able to describe it?

It may be very useful for college kids to share other ways of expressing what division means. What does 20 ÷ 4 imply?

Divide 20 by 4. Create 20 circles and divide them into 4 groups.  Circle each group of 5.
  • To divide is to divide into teams
  • what number of are in every group
  • 20 ÷ 4 is to divide into 4 teams. What number of are in ONE group?
  • Which is ONE of the 4 teams?
  • Create 4 teams. Evenly divide the 20 items into all teams.
  • What number of will every group have when the 20 items are divided equally?
  • What different methods are you able to say this?

By not at all times presenting or saying it the identical means, college students assist to grasp the idea of division.

20 times a quarter is the same as 20 divided by 4

Why is 20 instances 1 / 4 the identical as 20 ÷ 4?

If you divide by 4 you specific what number of are in ONE of the teams.

What would change when you divided by a fourth?

What if as a substitute of 20 instances 1 / 4, you had 20 divided by 1 / 4?

20 divided by a quarter

examine and distinction

How is dividing by 1/4 totally different from dividing by 4?

Every bit is split right into a fourth. 1/4 of every piece is a small piece.

Consider taking a sweet bar (which has segments, like a Hershey™ bar) and breaking it up into every bit. You went from 1 piece (bar) to 12 items.

You may have 20 items and also you divide every bit into quarters (1/4)…then every giant piece turns into 4 small items…for a complete of 80 items.

What when you had 20 hours of yard work throughout the semester? No person needs to work within the backyard, so it’s agreed to divide it into 15-minute slots (1 / 4 of an hour). How many individuals are wanted to cowl 20 hours of service? An individual is just doing a fraction of an hour. So if there’s a whole of 20 hours of yard work within the semester, it would take plus of 20 individuals to cowl this. Every hour has 4 rooms… so 4 persons are wanted every hour. 4 individuals each hour for 20 hours is… 80 individuals. Or 80 time slots to cowl.

Fraction divided by a complete quantity

So once we had 20 divided by 1 / 4, we ended up with 80 small items. However what if we began with a fraction and needed to divide it? I selected to divide by 2 as a result of most of us intuitively know which means 1/2. YOU KNOW THAT ÷2 is the same as 1/2

a quarter divided by 2. Visualize it as 4 pieces and you want ONE of the four pieces.  Now cut it in half.

Reduce every of these 1/4 items in half. You need ONE of TWO items which can be created by reducing the piece.

So first you’re taking 1/4, which suggests you narrow every thing into 4 components. You then take 1 of the 4 items (1/4) and divide it into two items. You need ONE of the TWO smaller items. Breaking it into smaller items means you’ve extra items. So every thing would have a complete of 8 items, however you solely have 1 of the 8 smallest items.

You began with one piece.
broke into 4 items
and broke it into 8 items.
And you’ve got one of many 8 items
that is an eighth

You need half of the fourth piece.

Fraction divided by a fraction

Let’s examine that to dividing in half.

This isn’t the identical math downside. I’m NOT dividing every bit into 2 items. I’m dividing every bit right into a half piece.

Keep in mind how 20 items divided into 1/4 dimension items ended up with 80 smaller items.

20 divided by 1/4 dimension is 80. (Discover how I maintain rephrasing it! It is actually vital to maintain rethinking other ways of claiming what it means. Making sense of it’s math observe #1.) What number of quarter cups of flour are in 20 cups of flour?

Of the 20 items, every was minimize into 4 smaller items.
Of all of the 1/4 items, every was minimize into 2 smaller items.

Clearly 2 of those newly created smaller items collectively would make 1/4 piece. There are 4 of the newly created 1/8 items.
Visually put all of the triangles collectively and you may find yourself with 4 of the 8 items… or half of every thing.

three of 4

What number of 1/4 are there in 20?

What number of three fourths are there in 20?
You may have 20 cups of flour and you utilize a 3/4 cup measurer. What number of 3/4′ cups are there?

Now keep in mind that you’ve got ALL 20 cups of flour. You’re simply making smaller flour sachets that solely have 3/4 cup of flour. What number of small baggage of flour will you’ve? 20 + 6 + two of three

In case you needed to take all 26 baggage and put them into third-size baggage to get a typical denominator (improper fraction), then every of these 26 baggage in thirds can be a complete of 78 third-size baggage.

78 baggage of the third dimension + 2 baggage of the third dimension = 80 baggage of the medium dimension.

26 baggage and a couple of/3 of a bag.

now with fractions

How about 1/4 divided by 3/4?

That is NOT three quarters of 1/4. It is a quarter divided into 3/4 dimension items. You need to find yourself with a bigger variety of items.

I find yourself not with 3 chocolate bars… however with THREE items of 1 / 4 of a chocolate bar.

The reply is THREE however the dimension modified. Let’s consider it as 3 enjoyable sized chocolate bars!

How about 3/5 divides 1/4?

I’ve 3/5 cup of flour. I wish to divide this into 1/4 (not cup) sachets. What number of 1/4 are there in 3/5?

I’ve 2 and a couple of/5 teams

In any other case

Even after you’ve got figured it out… what’s one other strategy to put it? The extra methods you must specific an issue, the extra versatile you’re with numbers in numerous conditions.

Three fifths is three… 1/5. Or three teams of 1/5. Being versatile about dividing fractions makes many math issues a lot simpler!

Considering of three/5 as THREE 1/5 permits me to regroup the unique query. Are you able to separate the numbers? Regroup? Use the associative and commutative properties to rethink how numbers can work together?

Utilizing the commutative property I modified the 1/5 and the three.

After I’m breaking down numbers, I typically change the numbers solely so I can see how different numbers work together after which return to the unique set of numbers and apply the sample I found. That is math observe #7 and math observe #8. I am unsure what I can do with this regrouping. I am going to have a look at some extra acquainted numbers:

12 divided by 3 instances 4

Let’s check out the idiotic math downside I might at all times give my highschool college students. WHY would you give them 12 divided by 3 instances 4? As a result of I knew they might be improper. MY ONLY function for placing this on a quiz was…take away factors? Present them they’re dangerous at math? Complain later that the kids cannot do a easy order of operations?

What he confirmed was…college students do not have quantity sense. It’s NOT that they’re dangerous at math.

I do NOT must go from left to proper. The commutative property says {that a}•b•c = c•a•b. So if I’ve multiplication, I can change the order. Nonetheless, division is multiplication of a fraction. Begin studying the division image as fraction. Not solely will this assist you (and your college students) get higher at fractions, it opens up a complete new risk for learn how to simplify expressions.

12 divides 3 by 4 it’s 12 fraction 3 instances 4 both 12 instances 1/3 instances 4

Flat out, it is not 3 instances 4 in any respect. The division clearly places the three within the denominator. Let’s have that dialog. WHAT is dividing. As an alternative of a rule that claims “From left to proper”… BUT WHY?

The reality is, most individuals don’t know WHY. The reply I get after I ask that’s overwhelmingly “as a result of that is what my instructor advised me.”

Math should NOT be reduced to a set of rules that you memorized because your teacher told you to. @alicekeeler

Get within the behavior of taking a look at issues in numerous methods. Evaluate and distinction. Why is that this answer totally different from one other (related) downside?

I do not learn about you, however I get some concepts by switching loosely between the division image and a fraction. Being comfy with equal expressions is having a greater quantity sense.

Again to three/5 Divided by 1/4

Dividing by 5 means: “What number of GROUPS of dimension 5 are you able to create?” So first we break all three into smaller items. Divide by 1/4 says to divide every into fourths. This creates 12 items. Now we wish to make teams of dimension 5. I can create 2 full teams with 2 additional 5’s. So 12 items divided by 5 (12/5) or 2 and a couple of/5.

Google Jam Board

To see the Google Jamboard I made to discover visualizing fractions:

  • Free Poster: Chromebook Keyboard Shortcuts

  • How would you visualize a fraction divided by a fraction?

    How would you visualize a fraction divided by a fraction?

  • Create a NEW Google Jamboard

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How Would You Visualize a Fraction Divided by a Fraction

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