Examples for

# Common Core Math: Grade 1

In first grade, students build fluency in adding and subtracting with numbers up to 20, including addition of three whole numbers. Students solve for unknown values in addition and subtraction equations and, based on place value understanding, add and subtract with multiples of 10. Students also describe shapes based on their defining attributes and compose and partition shapes. Students learn to tell time, represent data and measure lengths in various units.

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Describe place value and perform addition and subtraction up to 120.

#### Describe the place values of a number (CCSS.Math.Content.1.NBT.B.2):

#### Compare the magnitudes of numbers (CCSS.Math.Content.1.NBT.B.3):

#### Add whole numbers (CCSS.Math.Content.1.NBT.C.4):

#### Subtract with multiples of 10 (CCSS.Math.Content.1.NBT.C.6):

Perform addition and subtraction up to 20.

#### Add and subtract whole numbers (CCSS.Math.Content.1.OA.C.6):

#### Solve addition and subtraction equations (CCSS.Math.Content.1.OA.D.8):

Measure lengths and tell time to the nearest half-hour.

#### Measure the lengths of objects in terms of various units (CCSS.Math.Content.1.MD.A.2):

#### Tell and write time (CCSS.Math.Content.1.MD.B.3):

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Step-by-Step Solutions for ArithmeticPre-Algebra Web AppFree Unlimited Arithmetic Practice Problems### RELATED EXAMPLES

Define and partition shapes.