3rd Grade Area, Multiplication & Addition Lesson
Lesson: Activities for CCSS C7


Standards
  • CCSS.Math.Content.3.MD.C.7 Relate area to the operations of multiplication and addition.
    • CCSS.Math.Content.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.
    • CCSS.Math.Content.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.
    • CCSS.Math.Content.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 × b and a × c. Use area models to represent the distributive property in mathematical reasoning.
    • CCSS.Math.Content.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.
Area Word Problems
Jack's Rectangles
   "Jack needed to find the area of a rectangle that was 5 square units     by 13 square units. He decided to break the rectangle into two smaller rectangles, find the area of each rectangle and then add the two products."