Finding Area of a Rectangle by Decomposing It into Smaller Rectangles

This video tutorial teaches how to find the area of a rectangle by decomposing it into smaller rectangles. It begins with a review of basic area calculation using multiplication and introduces the concept of decomposing numbers into simpler parts using number bonds. The tutorial provides examples of decomposing both columns and rows to simplify multiplication, making it easier to calculate the area of rectangles with larger side measurements. The video emphasizes that there are multiple ways to decompose numbers and encourages choosing the method that makes the most sense for the problem at hand.

What is the primary method used to find the area of a rectangle in this lesson?

• Using addition

• Using subtraction

• Using multiplication

• Using division

How is the number 14 decomposed to simplify the multiplication process?

• Into 8 and 6

• Into 5 and 9

• Into 10 and 4

• Into 7 and 7

What is the area of a rectangle with side measurements of 5 and 14 after decomposition?

• 50 square units

• 60 square units

• 70 square units

• 80 square units

In the second example, how is the number 16 decomposed?

• Into 8 and 8

• Into 10 and 6

• Into 12 and 4

• Into 9 and 7

What is the total area of a rectangle with side measurements of 16 and 7 after decomposition?

• 132 square units

• 122 square units

• 112 square units

• 102 square units