Adding Unit Squares to Find Area

What expression can be used to find the area of this shape, in square units? (Area = Length x Width)

• 5x4

• 3x4

• 5x5

What is the AREA of the shape?

• 16 sq. units

• 12 sq. units

• 9 sq. units

Which figure is 12 square units?

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How would you find the AREA of the pink model?
(click to show image)

•  Add 4 by 3

• Multiply 4 by 3

• Add 4 and 4

• Multiply 4 by 4

What is the area of the shaded portion?

• 10 square units

• 13 square units

• 30 square units

• 20 square units

What would be the new area of the pink model if someone added a 4th row? hint rows are side to side. Not up and down!

• 12

• 14

• 16

• 18

The label for area is 

• units squared

•  units

• you do not need a label.

Sean found the area of the rectangle by counting the squares. What other way could he have found the area?

• multiplying 3 and 4

• multiplying 3 and 5

• adding 4 and 3

• adding 4 and 5

Lilly wants to find the area of this piece of glass using gray square tiles. Each tile has the area of 1 square unit. Which models show a way that Lily could find the area of the piece of glass?

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Each square in this rectangle equals 1 inch. How do you find the area?

•  There are 7 rows and 8 columns, so you should add 7 + 8 to get 15 total blocks.

• There are 8 columns and 7 rows, so you should subtract 8 – 7 to get 1 rectangle

• There are 7 rows and 8 columns, so you should multiply 7 × 8 to get 56 square inches

• D. There are 8 columns and 7 rows, and you add the 8 from top and bottom and the 7 from both sides to get 8 + 8 + 7 + 7 to get an area of 30.