## Mathematics Standards

## Results

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**21**-**30**of**734**Standards#### Standard Identifier: K.OA.2

Grade:

**K**
Domain:

**Operations and Algebraic Thinking****Cluster**:

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

**Standard**:

Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

#### Standard Identifier: K.OA.3

Grade:

**K**
Domain:

**Operations and Algebraic Thinking****Cluster**:

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

**Standard**:

Decompose numbers less than or equal to 10 into pairs in more than one way, e.g., by using objects or drawings, and record each decomposition by a drawing or equation (e.g., 5 = 2 + 3 and 5 = 4 + 1).

#### Standard Identifier: K.OA.4

Grade:

**K**
Domain:

**Operations and Algebraic Thinking****Cluster**:

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

**Standard**:

For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or drawings, and record the answer with a drawing or equation.

#### Standard Identifier: K.OA.5

Grade:

**K**
Domain:

**Operations and Algebraic Thinking****Cluster**:

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

**Standard**:

Fluently add and subtract within 5.

#### Standard Identifier: 1.G.1

Grade:

**1**
Domain:

**Geometry****Cluster**:

Reason with shapes and their attributes.

**Standard**:

Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.

#### Standard Identifier: 1.G.2

Grade:

**1**
Domain:

**Geometry****Cluster**:

Reason with shapes and their attributes.

**Standard**:

Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape.

**Footnote**:

Students do not need to learn formal names such as “right rectangular prism.”

#### Standard Identifier: 1.G.3

Grade:

**1**
Domain:

**Geometry****Cluster**:

Reason with shapes and their attributes.

**Standard**:

Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.

#### Standard Identifier: 1.MD.1

Grade:

**1**
Domain:

**Measurement and Data****Cluster**:

Measure lengths indirectly and by iterating length units.

**Standard**:

Order three objects by length; compare the lengths of two objects indirectly by using a third object.

#### Standard Identifier: 1.MD.2

Grade:

**1**
Domain:

**Measurement and Data****Cluster**:

Measure lengths indirectly and by iterating length units.

**Standard**:

Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.

#### Standard Identifier: 1.MD.3

Grade:

**1**
Domain:

**Measurement and Data****Cluster**:

Tell and write time.

**Standard**:

Tell and write time in hours and half-hours using analog and digital clocks.

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**21**-**30**of**734**Standards
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