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Module 4
Multiplication and Area



Throughout this Module, students will:
  • understand area of plane figures
  • tile with unit squares to determine area
  • use cm and inch squares when comparing areas
  • distinguish between length and area
  • draw area models
  • determine area of rectangles by drawing rows and columns
  • discover area formulas for rectangles
  • reason about area of rectangles
  • use distributive property to find total area
  • use associative property to determine side lengths of rectangles
  • solve word problems involving area
  • decompose figures into rectangles to find area

Terminology Definition Illustration
area the amount of two-dimensional space in a bounded region
area model a model for multiplication that relates rectangular arrays to area
square unit a unit of area - specifically square centimeters, inches, feet, and meters
tile to cover a region without gaps or overlaps
unit square a square with side lengths of 1 unit each. It has an area of 1 square unit.
whole number an integer, a number without fractions
array a set of numbers or objects that follow a specific pattern, a matrix
commutative property changing the order of the factors or addends does not change the product or sum
distribute e.g. 2 x (3+4) = 2 x 3 +2 x 4
geometric shape a two-dimensional object with a specific outline or form
length the straight-line distance between two points
multiplication an operation showing how many times a number is added to itself
rows and columns arrangement of numbers or information in an array or table

images sourse

distributive property - area from JD K-4 Math on Vimeo.

finding total area given 2 rectangles from JD K-4 Math on Vimeo.

subtract to find area of composite shape from JD K-4 Math on Vimeo.

finding area by decomposing or completing composite figures from JD K-4 Math on Vimeo.



Dr. Peter Smith, Superintendent

P.O. Box 606
DeWitt, NY 13214

Phone: (315) 445-8300

Developed by CNYRIC