SME
Grade 3 Math
Area and multiplication
The main lesson, then each kind of problem it solves.
Area and multiplication
Main lesson
Find an unknown side from the area
Use this when you know the area and one side: “24 cm², 6 cm long. How wide?”
Area and the distributive property
Use this to split a rectangle into two and add the areas: 6 × 8 = 6 × 5 + 6 × 3.
Area of composite figures
Use this to find the area of an L-shape made of two rectangles.
Area of a shape with a corner cut out
Use this for an L-shape: the whole rectangle take away the corner cut out.