# Pennsylvania Core Standards in Mathematics — Grade 1

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#### CC.2.1.1.B.1

Extend the counting sequence to read and write numerals to represent objects.

#### CC.2.1.1.B.2

Use place-value concepts to represent amounts of tens and ones and to compare two digit numbers.

#### CC.2.1.1.B.3

Use place-value concepts and properties of operations to add and subtract within 100.

#### CC.2.2.1.A.1

Represent and solve problems involving addition and subtraction within 20.

#### CC.2.2.1.A.2

Understand and apply properties of operations and the relationship between addition and subtraction.

#### CC.2.3.1.A.1

Compose and distinguish between two- and three dimensional shapes based on their attributes

#### CC.2.3.1.A.2

Use the understanding of fractions to partition shapes into halves and quarters.

#### CC.2.4.1.A.1

Order lengths and measure them both indirectly and by repeating length units.

#### CC.2.4.1.A.2

Tell and write time to the nearest half hour using both analog and digital clocks.

#### CC.2.4.1.A.4

Represent and interpret data using tables/charts.