CPALMS
 
spacer Benchmark Icon spacer Benchmark: MA.4.G.3.2
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Benchmark Number: MA.4.G.3.2
Benchmark Description: Justify the formula for the area of the rectangle "area = base x height".
Subject Area: Mathematics  
Grade Level: 4  
Body of Knowledge: Geometry  
Big Idea: BIG IDEA 3 - Develop an understanding of area and determine the area of two-dimensional shapes.  
Date Adopted or Revised: 09/07  
Date of Last Rating: 06/07  
Cognitive Complexity: Moderate  -  What does this mean?  
Status: State Board Approved  
Remarks/Examples: The students should be able to justify the formula for the area of the rectangle by explaining how counting units to find area of a rectangle is related to finding the area by multiplying.

 

The idea of the area of a rectangle as "base x height" rather than "length x width" is useful in connecting to other area formulas.

 

 
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Reporting Category: Geometry and Measurement
Item Type(s):
This benchmark will be assessed using: MC items.
At Grade 4, this benchmark will be assessed using MC items.
Clarification: Students will identify situations that require the use of the area formula in real-world contexts.

Students will identify the number of square units of a rectangle as the base times the height.
Content Limits: Items may include deriving or explaining the area of a rectangle in order to solve real-world problems.

Items will not include the formula for the area of a rectangle.
Stimulus Attributes: Items may be set in either a real-world or a mathematical context.

Items may be on a grid, but a grid is not required.

Graphics should be used in all these items.
Response Attributes: Responses should include units.
  


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» Sample Item 1:
Mr. Clark hired workers to construct an in-ground pool in his backyard. For which of the following...   ...read more
NA
MC : Multiple Choice
  


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» 5012060 Mathematics - Grade Four
» 7712050 Access Mathematics - Grade 4
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Independent
» MA.4.G.3.In.b : Find the length of the sides and the area of rectangular and square objects using square units.

Remarks:
Cover a rectangular area with carpet squares and count the number of carpet squares.

Supported
» MA.4.G.3.Su.b : Count the number of square units of a rectangle marked with a grid to determine its area.

Participatory
» MA.4.G.3.Pa.a : Identify the sides of a square or rectangle.

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