# Oregon State Standards for Mathematics: Grade 3

Currently Perma-Bound only has suggested titles for grades K-8 in the Science and Social Studies areas. We are working on expanding this.

OR.3.1. Number and Operations: Develop an understanding of fractions and fraction equivalence.

3.1.1. Represent common fractions (e.g., halves, thirds, fourths, tenths) as equal parts of a whole, parts of a set, or points or distances on a number line.

3.1.2. Recognize and demonstrate that sizes of fractional parts are relative to the size of the whole.

3.1.3. Use fractions to represent numbers that are equal to, less than, or greater than one.

3.1.4. Solve problems that involve comparing and ordering fractions by using models, benchmarks (0, 1/2, 1), or common numerators or denominators.

3.1.5. Identify equivalent fractions using models, including the number line.

3.1.6. Add common fractions with like denominators.

OR.3.2. Number and Operations, Algebra, and Data Analysis: Develop understandings of multiplication and division, and strategies for basic multiplication facts and related division facts.

3.2.1. Represent and apply the concept of multiplication as repeated addition.

3.2.2. Represent and apply the concept of division as repeated subtraction and forming equal groups.

3.2.3. Apply models of multiplication (e.g., equal-sized groups, arrays, area models, equal ''jumps'' on number lines and hundreds charts) and division (e.g., repeated subtraction, partitioning, and sharing) to solve problems.

3.2.4. Apply increasingly sophisticated strategies based on the number properties (e.g., place value, commutative, associative, distributive, identity, and zero) to solve multiplication and division problems involving basic facts.

3.2.5. Apply the inverse relationship between multiplication and division (e.g., 5 x 6 = 30, 30 / 6 = 5) and the relationship between multiples and factors.

3.2.6. Represent, analyze and extend number patterns using rules that involve multiplication and/or addition (e.g., {3, 6, 9, 12, . . . }, .{1, 2, 4, 8, . . . } ).

3.2.7. Analyze frequency tables, bar graphs, picture graphs, and line plots; and use them to solve problems involving addition, subtraction, multiplication, and division.

OR.3.3. Geometry and Measurement: Describe and analyze properties of two-dimensional shapes, including perimeters.

3.3.1. Identify right angles in two-dimensional shapes and determine if angles are greater than or less than a right angle (obtuse and acute).

3.3.2. Identify, describe, compare, analyze, and informally classify triangles by their sides and angles.

3.3.3. Identify, describe, compare, analyze, and classify quadrilaterals (square, rectangle, parallelogram, rhombus, and trapezoid) by their sides and angles.

3.3.4. Identify, describe, and compare pentagons, hexagons, and octagons by the number of sides or angles.

3.3.5. Investigate and describe the results of decomposing, combining, and transforming polygons to make other polygons.

3.3.6. Build, draw, and analyze two-dimensional shapes to understand attributes and properties of two-dimensional space.

3.3.7. Determine an appropriate unit, tool, or strategy to find the perimeter of polygons.

3.3.8. Use attributes and properties of two-dimensional shapes to solve problems including applications involving parallel and perpendicular lines, congruence, symmetry, and perimeter.

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