Exploring Number Sentences for Area of Rectangles

The video tutorial introduces third graders to the concept of area, using real-life examples like laying sod or painting walls. It explains how to calculate the area of rectangles by counting squares and rows, and then introduces a more efficient method using multiplication of length and width. The tutorial includes practice problems and concludes with instructions for students to submit their work.

If you multiply the length by the width of a rectangle, what are you calculating?

• Perimeter

• Volume

• Density

• Area

What is the area of a rectangle if one side is 10 cm and the other side is 8 cm?

• 100 cm squared

• 80 cm squared

• 82 cm squared

• 18 cm squared

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

How many square units is the area of a 4x6 rectangle?

• 12 square units

• 20 square units

• 24 square units

• 10 square units

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the formula to calculate the area of a rectangle?

• Length + Width

• Length x Width

• Length / Width

• Length - Width

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the area of a square where each side is 6 units?

• 30 units squared

• 18 units squared

• 36 units squared

• 12 units squared

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

For a rectangle with dimensions 5 by 10, what is the calculated area?

• 5 square units

• 510 square units

• 50 square units

• 15 square units

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the area of a rectangle with sides 3 cm and 2 cm?

• 5 cm squared

• 6 cm squared

• 10 cm squared

• 8 cm squared

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Which of the following is a correct representation of area calculation?

• 4 / 5 = 0.8

• 4 - 5 = -1

• 4 + 5 = 9

• 4 x 5 = 20

Tags

CCSS.3.MD.C.7D

If a rectangle measures 4 by 8, what is its area using the multiplication method?

• 39 square units

• 32 square units

• 52 square units

• 12 square units

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What should you do after learning the area calculation?

• Start a new topic

• Take a break

• Upload pictures of your work to Schoology

• Forget the formulas

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3