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Mathematics Standards




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Showing 31 - 40 of 109 Standards

Standard Identifier: 2.NBT.8

Grade: 2
Domain: Number and Operations in Base Ten

Cluster:
Use place value understanding and properties of operations to add and subtract.

Standard:
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.

Standard Identifier: 2.NBT.9

Grade: 2
Domain: Number and Operations in Base Ten

Cluster:
Use place value understanding and properties of operations to add and subtract.

Standard:
Explain why addition and subtraction strategies work, using place value and the properties of operations.

Footnote:
Explanations may be supported by drawings or objects.

Standard Identifier: 3.G.1

Grade: 3
Domain: Geometry

Cluster:
Reason with shapes and their attributes.

Standard:
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.

Standard Identifier: 3.G.2

Grade: 3
Domain: Geometry

Cluster:
Reason with shapes and their attributes.

Standard:
Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.

Standard Identifier: 3.NBT.1

Grade: 3
Domain: Number and Operations in Base Ten

Cluster:
Use place value understanding and properties of operations to perform multi-digit arithmetic.

Standard:
Use place value understanding to round whole numbers to the nearest 10 or 100.

Footnote:
A range of algorithms may be used.

Standard Identifier: 3.NBT.2

Grade: 3
Domain: Number and Operations in Base Ten

Cluster:
Use place value understanding and properties of operations to perform multi-digit arithmetic.

Standard:
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

Standard Identifier: 3.NBT.3

Grade: 3
Domain: Number and Operations in Base Ten

Cluster:
Use place value understanding and properties of operations to perform multi-digit arithmetic.

Standard:
Multiply one-digit whole numbers by multiples of 10 in the range 10–90 (e.g., 9 × 80, 5 × 60) using strategies based on place value and properties of operations.

Standard Identifier: 3.NF.1

Grade: 3
Domain: Number and Operations—Fractions

Cluster:
Develop understanding of fractions as numbers.

Standard:
Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.

Footnote:
Grade 3 expectations in this domain are limited to fractions with denominators 2, 3, 4, 6, and 8.

Standard Identifier: 3.NF.2.a

Grade: 3
Domain: Number and Operations—Fractions

Cluster:
Develop understanding of fractions as numbers.

Standard:
Understand a fraction as a number on the number line; represent fractions on a number line diagram. Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line.

Standard Identifier: 3.NF.2.b

Grade: 3
Domain: Number and Operations—Fractions

Cluster:
Develop understanding of fractions as numbers.

Standard:
Understand a fraction as a number on the number line; represent fractions on a number line diagram. Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.

Showing 31 - 40 of 109 Standards


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