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Lesson 6: Area in the Real World
Date: 5/29/14 S.25
25
© 2014 Common Core, Inc. Some rights reserved. commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6
Lesson 6: Area in the Real World
Classwork
Exploratory Challenge
Example 1: Classroom Wall Paint
The custodians are considering painting our classroom next summer. In order to know how much paint they must buy,
the custodians need to know the total surface area of the walls. Why do you think they need to know this and how can
we find the information?
Make a prediction of how many square feet of painted surface there are on one wall in the room. If the floor has square
tiles, these can be used as a guide.
Exercise 1
The custodians are considering painting this room next summer. Estimate the dimensions and the area. Predict the area
before you measure.
My prediction: ______________ ft2
.
a. Measure and sketch one classroom wall. Include measurements of windows, doors, or anything else that
would not be painted.
Lesson 6: Area in the Real World
Date: 5/29/14 S.26
26
© 2014 Common Core, Inc. Some rights reserved. commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6
Object or Item
to be Measured
Measurement
Units
Precision
(Measure
to the
Nearest):
Length Width Expression that
Shows the Area
Area
door feet half foot 6
1
2
𝑓𝑡. 3
1
2
𝑓𝑡. 6
1
2
𝑓𝑡. × 3
1
2
𝑓𝑡. 22
3
4
𝑓𝑡2
b. Work with your partners and your sketch of the wall to determine the area that will need paint. Show your
sketch and calculations below and clearly mark your measurements and area calculations.
c. A gallon of paint covers about 350 ft2
. Write an expression that shows the total area.
Evaluate it to find how much paint will be needed to paint the wall.
d. How many gallons of paint would need to be purchased to paint the wall?
Lesson 6: Area in the Real World
Date: 5/29/14 S.27
27
© 2014 Common Core, Inc. Some rights reserved. commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6
Exercise 2
Object or item to be
measured
Measurement
units
Precision
(measure to the
nearest):
Length Width Area
door feet half foot 6
1
2
𝑓𝑡. 3
1
2
𝑓𝑡. 22
3
4
𝑓𝑡2
Lesson 6: Area in the Real World
Date: 5/29/14 S.28
28
© 2014 Common Core, Inc. Some rights reserved. commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6
Problem Set
1. Below is a drawing of a wall that is to be covered with either wallpaper or paint. It is 8 ft. high and 16 ft. long. The
window, mirror and fireplace will not be painted nor papered. The window measures 18 in. by 14 ft. The fireplace
is 5 ft. wide and 3 ft. high, while the mirror above the fireplace is 4 ft. by 2 ft.
a. How many square feet of wallpaper are needed to cover the wall?
b. The wallpaper is sold in rolls that are 18 in. wide and 33 ft. long. Rolls of solid color wallpaper will be used, so
patterns do not have to match up.
i. What is the area of one roll of wallpaper?
ii. How many rolls would be needed to cover the wall?
c. This week the rolls of wallpaper are on sale for $11.99/roll. Find the cost of covering the wall with wallpaper.
d. A gallon of special textured paint covers 200 ft2
and is on sale for $22.99/gallon. The wall needs two coats of
paint. Find the cost of using paint to cover the wall.
2. A classroom has a length of 20 feet and a width of 30 feet. The flooring is to be replaced by tiles. If each tile has a
length of 24 inches and a width of 36 inches, how many tiles are needed to cover the classroom floor?
3. Challenge: Assume that the tiles from Problem 2 are unavailable. Another design is available, but the tiles are
square, 18 inches on a side. If these are to be installed, how many must be ordered?
4. A rectangular flower bed measures 10 m by 6 m. It has a path 2 m around it. Find
the area of the path.
Lesson 6: Area in the Real World
Date: 5/29/14 S.29
29
© 2014 Common Core, Inc. Some rights reserved. commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6
5. Tracy wants to cover the missing portion of his deck with soil in order to grow a garden.
a. Find the missing portion of the deck. Write the expression and evaluate it.
b. Find the missing portion of the deck using a different method. Write the expression and evaluate it.
c. Write your two equivalent expressions.
d. Explain how each demonstrates a different understanding of the diagram.
6. The entire large rectangle below has an area of 3
1
2
ft2
. If the dimensions of the white rectangle are as shown below,
write and solve an equation to find the area, 𝐴, of the shaded region.

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G6 m5-a-lesson 6-s

  • 1. Lesson 6: Area in the Real World Date: 5/29/14 S.25 25 © 2014 Common Core, Inc. Some rights reserved. commoncore.org This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6 Lesson 6: Area in the Real World Classwork Exploratory Challenge Example 1: Classroom Wall Paint The custodians are considering painting our classroom next summer. In order to know how much paint they must buy, the custodians need to know the total surface area of the walls. Why do you think they need to know this and how can we find the information? Make a prediction of how many square feet of painted surface there are on one wall in the room. If the floor has square tiles, these can be used as a guide. Exercise 1 The custodians are considering painting this room next summer. Estimate the dimensions and the area. Predict the area before you measure. My prediction: ______________ ft2 . a. Measure and sketch one classroom wall. Include measurements of windows, doors, or anything else that would not be painted.
  • 2. Lesson 6: Area in the Real World Date: 5/29/14 S.26 26 © 2014 Common Core, Inc. Some rights reserved. commoncore.org This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6 Object or Item to be Measured Measurement Units Precision (Measure to the Nearest): Length Width Expression that Shows the Area Area door feet half foot 6 1 2 𝑓𝑡. 3 1 2 𝑓𝑡. 6 1 2 𝑓𝑡. × 3 1 2 𝑓𝑡. 22 3 4 𝑓𝑡2 b. Work with your partners and your sketch of the wall to determine the area that will need paint. Show your sketch and calculations below and clearly mark your measurements and area calculations. c. A gallon of paint covers about 350 ft2 . Write an expression that shows the total area. Evaluate it to find how much paint will be needed to paint the wall. d. How many gallons of paint would need to be purchased to paint the wall?
  • 3. Lesson 6: Area in the Real World Date: 5/29/14 S.27 27 © 2014 Common Core, Inc. Some rights reserved. commoncore.org This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6 Exercise 2 Object or item to be measured Measurement units Precision (measure to the nearest): Length Width Area door feet half foot 6 1 2 𝑓𝑡. 3 1 2 𝑓𝑡. 22 3 4 𝑓𝑡2
  • 4. Lesson 6: Area in the Real World Date: 5/29/14 S.28 28 © 2014 Common Core, Inc. Some rights reserved. commoncore.org This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6 Problem Set 1. Below is a drawing of a wall that is to be covered with either wallpaper or paint. It is 8 ft. high and 16 ft. long. The window, mirror and fireplace will not be painted nor papered. The window measures 18 in. by 14 ft. The fireplace is 5 ft. wide and 3 ft. high, while the mirror above the fireplace is 4 ft. by 2 ft. a. How many square feet of wallpaper are needed to cover the wall? b. The wallpaper is sold in rolls that are 18 in. wide and 33 ft. long. Rolls of solid color wallpaper will be used, so patterns do not have to match up. i. What is the area of one roll of wallpaper? ii. How many rolls would be needed to cover the wall? c. This week the rolls of wallpaper are on sale for $11.99/roll. Find the cost of covering the wall with wallpaper. d. A gallon of special textured paint covers 200 ft2 and is on sale for $22.99/gallon. The wall needs two coats of paint. Find the cost of using paint to cover the wall. 2. A classroom has a length of 20 feet and a width of 30 feet. The flooring is to be replaced by tiles. If each tile has a length of 24 inches and a width of 36 inches, how many tiles are needed to cover the classroom floor? 3. Challenge: Assume that the tiles from Problem 2 are unavailable. Another design is available, but the tiles are square, 18 inches on a side. If these are to be installed, how many must be ordered? 4. A rectangular flower bed measures 10 m by 6 m. It has a path 2 m around it. Find the area of the path.
  • 5. Lesson 6: Area in the Real World Date: 5/29/14 S.29 29 © 2014 Common Core, Inc. Some rights reserved. commoncore.org This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 6 5. Tracy wants to cover the missing portion of his deck with soil in order to grow a garden. a. Find the missing portion of the deck. Write the expression and evaluate it. b. Find the missing portion of the deck using a different method. Write the expression and evaluate it. c. Write your two equivalent expressions. d. Explain how each demonstrates a different understanding of the diagram. 6. The entire large rectangle below has an area of 3 1 2 ft2 . If the dimensions of the white rectangle are as shown below, write and solve an equation to find the area, 𝐴, of the shaded region.