MD.3.7.d

Relate area to the operations of multiplication and addition.

d.  Recognize area as additive. Find areas of rectilinear figures by decomposing them into non-overlapping rectangles and adding the areas of the non-overlapping parts, applying this technique to solve real world problems.

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Formative Assessments
Formative Assessments
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Students are asked to find the areas of two rectangular figures and are observed to determine if they use multiplication.
Area of a Butterfly Garden
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Students are presented with a rectangular area model and asked to write an equation that represents the distributive property.
Using Arrays to Model the Distributive Property
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Students determine the area of a rectangle in two different ways.
Cover Me
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Students are given a rectilinear shape and asked to find its area.
Decompose Shapes to Find Area
Virtual/Hands-on Manipulatives
Virtual/Hands-on Manipulatives
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CPALMS: This extremely versatile manipulative can be used by learners of different grades. At early grades, this manipulative will help the students recognize, name, build, draw, and compare two-dimensional shapes.
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Assessment Questions
Assessment Questions
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Equation Editor
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Hook/Performance Tasks
Hook/Performance Tasks
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The purpose of this instructional task is for students to find the area of figures that can be decomposed and then recomposed into rectangles.
IM:  Finding the Area of Polygons
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This instructional task allows students to connect the distributive property with area models.
IM:  Introducing the Distributive Property
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The purpose of this task is for students to decompose a figure into rectangles and then find the total area by adding the area of all of its smaller, non overlapping rectangles.
IM:  Three Hidden Rectangles
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This task allows students to use the concept of tiling to linking area with multiplication.
IM:  India’s Bathroom Tiles