1. Math Unit 4 Lesson 15
Apply knowledge of area to determine areas of rooms in a given floor plan

2. SKIP COUNT! Skip Count By 3s To 30 … Skip Count By 6s To 60 …
Skip Count By 6s To 60 …
Skip Count By 7s To 70 …
Skip Count by 8s to 80 …

3. PATTERN SHEET

4. Find the area ___ sq. Units + ____ sq. Units = ___ sq. Units 8 6 14
Write an expression to show the area of the shaded rectangle
4 x 2 = 8 square units or 2 x 4 = 8 square units
Write an expression to show the area of the unshaded rectangle
3 x 2 = 6 square units or 2 x 3 = 6 square units
___ sq. Units + ____ sq. Units = ___ sq. Units 8 6 14

5. Find the area ___ sq. Units + ____ sq. Units = ___ sq. Units 12 2 14
Write an expression to show the area of the shaded rectangle
3 x 4 = 12 square units or 4 x 3 = 12 square units
Write an expression to show the area of the unshaded rectangle
2 x 1 = 2 square units or 1 x 2 = 2 square units
___ sq. Units + ____ sq. Units = ___ sq. Units 12 2 14

6. Find the area ___ sq. Units + ____ sq. Units = ___ sq. Units 14 6 20
Write an expression to show the area of the shaded rectangle
2 x 7 = 14 square units or 7 x 2 = 14 square units
Write an expression to show the area of the unshaded rectangle
2 x 3 = 6 square units or 3 x 2 = 6 square units
___ sq. Units + ____ sq. Units = ___ sq. Units 14 6 20

7. Find the area ___ sq. Units + ____ sq. Units = ___ sq. Units 12 8 20
Write an expression to show the area of the shaded rectangle
3 x 4 = 12 square units or 5 x 4 = 12 square units
Write an expression to show the area of the unshaded rectangle
2 x 4 = 8 square units or 4 x 2 = 8 square units
___ sq. Units + ____ sq. Units = ___ sq. Units 12 8 20

8. Finding Area Today, you will use the floor plan of a house.
For the next two days we are going to be ARCHITECTS. Architects are people who design buildings, such as homes, schools, offices or apartments.
Today, you will use the floor plan of a house.
You will find the area of each room in square centimeters.

9. Strategies we can use to find area
Look at this floor plan.
What will we need to do before we can find the area of each room?
BINGO! We will need the side lengths.
Use your ruler to measure the side lengths of BEDROOM 1 in centimeters:
What is the length?
5 cm
What is the width?
12 cm

10. Strategies we can use to find area
Write an expression to show how to find the area of Bedroom 1:
5 x 12
5 x 12 is kind of a large multiplication fact. What strategy can we use to find the area since the fact is so large?
Break apart and distribute!
We can find the area by breaking it into two smaller rectangeles and adding their areas together.

11. ARISE! GO FORTH! CONQUER YOUR MATH!!!!
Problem Set!
ARISE! GO FORTH! CONQUER YOUR MATH!!!!