1st Grade Math Worksheets

First grade builds fluency with addition and subtraction within 20 and brings in place value: students count to 120, think of two-digit numbers as tens and ones, and add within 100. They also solve word problems, find missing numbers in equations, measure length, tell time to the half hour, and split shapes into halves and fourths. Every worksheet below is free, prints as a PDF with an answer key, and can be assigned online.

By Standard

Common Core

Operations and Algebraic Thinking

1.OA.11.OA.21.OA.31.OA.41.OA.51.OA.61.OA.71.OA.8

Number and Operations in Base Ten

1.NBT.11.NBT.2A1.NBT.2B1.NBT.2C1.NBT.31.NBT.41.NBT.51.NBT.6

Measurement and Data

1.MD.11.MD.21.MD.31.MD.4

Geometry

1.G.11.G.21.G.3

By Topic

Addition & Subtraction Facts Within 20

Fact drills and mixed practice adding and subtracting within 20, including counting on.

Adding Within 20Subtracting within 20 (horizontal)Mixed Drills

+43+44 more worksheets →

1.OA.51.OA.6

Adding Within 100

Add two-digit numbers, one-digit numbers and multiples of ten within 100.

Adding Within 100Adding Multiples of TenAdding Multiples of Ten (Horizontal)

+4+5 more worksheets →

1.NBT.4

Telling Time

Read and draw clocks to the hour and half hour.

Reading a Clock (Half Hour Increments)Matching Clocks (Half Hour Increments)Identifying Time Phrases

+1+2 more worksheets →

1.MD.3

Halves & Fourths

Split circles and rectangles into halves and fourths and name the shares.

Naming Fractions

1.G.3

Addition & Subtraction Word Problems

Solve word problems within 20, including adding three numbers.

Word Addition Within 20Word Subtraction Within 20Add & Subtract within 20

+4+5 more worksheets →

1.OA.11.OA.2

Place Value: Tens & Ones

Break two-digit numbers into tens and ones with place value blocks.

Breaking Apart Tens and OnesPlace value blocks (10s and 1s)Counting Groups of Ten

+1+2 more worksheets →

1.NBT.2A1.NBT.2B1.NBT.2C

Missing Numbers & True or False Equations

Find the missing addend and decide whether equations with an equal sign are true.

Addition & Subtraction (Fill in the Blank)Find Missing FactSolving Mixed Problems within 20 (+ -)

+6+7 more worksheets →

1.OA.71.OA.8

Ten More, Ten Less & Subtracting Tens

Find 10 more or 10 less than a number and subtract multiples of 10.

Subtracting Multiples of 10Finding Ten More and Ten LessSubtracting Multiples of Ten (Word)

+3+4 more worksheets →

1.NBT.51.NBT.6

Properties & Fact Families

Use the commutative and identity properties and connect subtraction to addition.

Subtraction Relative to AdditionUsing Commutative PropertyCombining Addends

+1+2 more worksheets →

1.OA.31.OA.4

Comparing Two-Digit Numbers

Compare two-digit numbers with the >, = and < symbols.

Comparing Two Digit NumbersIdentifying Number Value (within 100)Making True Equations

+0+1 more worksheets →

1.NBT.3

Counting to 120

Count, read and write numbers up to 120.

Word to Numeric Within 120Counting Within 120Counting Shapes

+0+1 more worksheets →

1.NBT.1

Shapes

Name shapes by their defining attributes, like sides and corners.

Identifying Shapes

1.G.11.G.2

Measuring Length

Order objects by length and measure them with same-size units.

Comparing Object LengthsUsing Units to Measure

1.MD.11.MD.2

Charts & Data

Organize data in up to three categories and answer how many more or less.

Organizing ChartsFinding More and Less

1.MD.4