How can we determine if Tobie and Torie each have enough lime juice for a party?
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How can we determine if Tobie and Torie each have enough lime juice for a party?
description
How can we determine if Tobie and Torie each have enough lime juice for a party?. In this lesson you will learn how to estimate answers to a real world problem involving fractions by using area models. An area model uses the area of rectangles to help us with fraction problems. =. =. 1. 2. - PowerPoint PPT Presentation
Transcript of How can we determine if Tobie and Torie each have enough lime juice for a party?
How can we determine if Tobie and Torie each have enough
lime juice for a party?
In this lesson you will learn how to estimate answers to a real world
problem involving fractions by using area models.
Let’s Review
An area model uses the area of rectangles to help us with fraction problems.
= =
Let’s ReviewFractions can only be compared when they
are based on the same whole.
12> >
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Notice that all of these fractions are based on the same whole: the yellow hexagon!
Let’s Review
Benchmark fractions are the ones we are most familiar with…
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Core Lesson
Reasonable means to be logical.
Reasonable!
X
Core LessonTobie and Torie each have a lime. They need a cup of lime
juice to make salsa for a party. Tobie squeezes a cup from his and Torie squeezes a cup from his. How much
lime juice do they have? Is it enough?
1. Calculate 2. Estimate 3. Compare
1 full cup YES!612
612
1212+ =
Core Lesson 2. Estimate
+ = 1whole cup of lime juice
Tobie and Torie each have a lime. They need a cup of lime juice to make salsa for a party. Tobie squeezes a cup
from his and Torie squeezes a cup from his. How much lime juice do they have? Is it enough?
?
Core Lesson 3. Compare
Calculated Estimated
1whole cup of lime juice
How did we do?
Our answer is reasonable!
Tobie and Torie each have a lime. They need a cup of lime juice to make salsa for a party. Tobie squeezes a cup
from his and Torie squeezes a cup from his. How much lime juice do they have? Is it enough?
1212
Core LessonTyler drank quarts of milk and Tina drank quarts of milk. How many more quarts did Tyler drink than Tina?
1. Calculate 2. Estimate 3. Compare
quart- =
Shawn Avery
Again, although this model definitely works to help us solve this problem, it's not the typical area model. You'll want to divide your 3/8 rectangle into fourths vertically. You'll find the equivalent fraction of 12/32. Then do the same for the 1/4 rectangle. Break it into 8ths. You'll find the equivalent fraction of 8/32s. You'll then subtract to get 4/32 which can be simplified to 1/8.
Core Lesson 2. EstimateTyler drank of quart of milk and Tina drank of a quart. How many more quarts did Tyler drink than Tina?
= = - = ?
Core Lesson 3. Compare
Calculated EstimatedHow did we do?
Our answer is reasonable!
Tyler drank of quart of milk and Tina drank of a quart. How many more quarts did Tyler drink than Tina?
In this lesson you have learned how to estimate answers to a real world problem involving fractions
by using area models.
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