### More about Area - free worksheet for grade 3

Here's a little sample of what is keeping me so busy right now - third grade math, aligning things to the Common Core standards.

This is a complete lesson (4 pages) about area for grade 3 math. It's not the initial lesson - it assumes the student already knows how to find the area of a rectangle.

The lesson (worksheets) is specifically about these two standards:

3.MD

7.c. 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.

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.

This is a complete lesson (4 pages) about area for grade 3 math. It's not the initial lesson - it assumes the student already knows how to find the area of a rectangle.

*(Sorry - there is no answer key at this time; it hasn't been made yet!)*The lesson (worksheets) is specifically about these two standards:

3.MD

7.c. 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.

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.

## Comments

Here is an overview of Common Core standards for math for 7th grade.

Grade 7 Overview

Ratios and Proportional Relationships Mathematical Practices

* Analyze proportional relationships and use them to solve real-world and mathematical problems.

The Number System

* Apply and extend previous understandings of operations with fractions to add, subtract, multiply, and divide rational numbers.

(This means integer arithmetic.)

Expressions and Equations

* Use properties of operations to generate equivalent expressions.

* Solve real-life and mathematical problems using numerical and algebraic expressions and equations.

Geometry

* Draw, construct and describe geometrical figures and describe the relationships between them.

* Solve real-life and mathematical problems involving angle measure, area, surface area, and volume.

Statistics and Probability

* Use random sampling to draw inferences about a population.

* Draw informal comparative inferences about two populations.

* Investigate chance processes and develop, use, and evaluate probability models.