All Lessons

(D) Decompose composite figures formed by rectangles into non-overlapping rectangles to determine the area of the original figure using the additive property of area

3.MD.7 Relate area to the operations of multiplication and addition.

3.MD.7.D 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.

(B) Determine the perimeter of a polygon or a missing length when given perimeter and remaining side lengths in problems

(Y5) Calculate perimeter and area of rectangles using familiar metric units (ACMMG109)

3.MD.8 Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.

3.MD.1 Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.

(Y3) Represent money values in multiple ways and count the change required for simple transactions to the nearest five cents (ACMNA059)

(Y3) Represent money values in multiple ways and count the change required for simple transactions to the nearest five cents (ACMNA059)

(B) Use attributes to recognize rhombuses, parallelograms, trapezoids, rectangles, and squares as examples of quadrilaterals and draw examples of quadrilaterals that do not belong to any of these subcategories

(Y2) Describe and draw two-dimensional shapes, with and without digital technologies (ACMMG042)

3.G.1 Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.