How Do We Write A Multiplication Equation To Find The Area Of A Rectangle?

Free How Do We Write A Multiplication Equation To Find The Area Of A Rectangle? Lesson Plan for 3rd Grade Students

Topic: Writing a multiplication equation to find the area of a rectangle

Objectives & Outcomes

Students will be able to write a multiplication equation to find the area of a rectangle.

Materials

Rectangles of various sizes

Calculator (optional)

Warm-up

Review what a rectangle is and its properties (e.g. length and width, opposite sides are parallel, etc.). Ask students to provide examples of rectangles they have seen in the real world.

Ask students if they have ever had to find the area of a rectangle before and how they did it.

Direct Instruction

Explain that there are two ways to find the area of a rectangle: by using multiplication or by using division.

Multiplication: Define multiplication as the process of multiplying a number by itself to find the result. For example, 3 x 3 = 9.

Division: Define division as the process of dividing a number by another number to find the result. For example, 9 ÷ 3 = 3.

Explain that to find the area of a rectangle using multiplication, we need to first find the width and then multiply it by the height.

To find the area of a rectangle using division, we need to first find the height and then divide it by the width.

Guided Practice

Provide students with a real-life example of a rectangular object and have them work in pairs to find the area using both multiplication and division.

Have students share their answers and explain their reasoning.

Independent Practice

Have students create a classroom-sized rectangle out of poster board or construction paper and measure its area.

Have students write a multiplication equation to find the area of their rectangle using both multiplication and division.

Have students present their calculations to the class and explain their reasoning.

Closure

Review the steps for writing a multiplication equation to find the area of a rectangle: multiply the length times the width, and then add any additional terms that are needed to make the equation true.

Ask students to share any questions or challenges they encountered while practicing this skill.

Assessment

Observe students during independent practice to check for understanding.

Have students turn in their completed multiplication equations to be checked for accuracy and correct use of multiplication to find area.

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