3.MD.C.7c
Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths a and b + c is the sum of a à b and a à c. Use area models to represent the distributive property in mathematical reasoning.
2 Lessons
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Area and Perimeter Review Using Legos - Days 1-53rd Grade Math» Unit:Review for Testing
3rd Grade Math
» Unit:
Review for Testing
Big Idea:Students calculate area, build areas to a given amount, and calculate the perimeter with the use of Legos.
Find The Array3rd Grade Math» Unit:Multiplication 2
3rd Grade Math
» Unit:
Multiplication 2
Big Idea:Students create arrays with two different colors of tiles and they will begin to use the distributive property of multiplication for their array.
3.MD.C.7a
Find the area of a rectangle with whole-number side lengths by tiling it, and show that the area is the same as would be found by multiplying the side lengths.
3.MD.C.7b
Multiply side lengths to find areas of rectangles with whole-number side lengths in the context of solving real world and mathematical problems, and represent whole-number products as rectangular areas in mathematical reasoning.
3.MD.C.7c
Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths a and b + c is the sum of a à b and a à c. Use area models to represent the distributive property in mathematical reasoning.
3.MD.C.7d
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.