SKIP TO CONTENT
Worksheet Generator
Subjects
Grades
Worksheets
Games
Build a Worksheet
More Resources
Roly Recommends
Subjects
Grades
Worksheets
Games
Build a Worksheet
More Resources
Roly Recommends
1st Grade Common Core Addition Resources for '1-20'
Filters
Math
Addition
368 results
Search for: 1-20
✕
Math
✕
1st Grade
✕
Common Core
✕
Clear all
368 results
Subtopics:
Addition Strategies
Addition Fact Fluency
Addition Properties
Repeated Addition
Multi-Digit Addition
Addition Word Problems
Show Less
Filters
Search for: 1-20
✕
Math
✕
1st Grade
✕
Common Core
✕
Subjects
Math
English Language Arts
Science
Social Studies
Grade Level
Pre-K
K
1st
2nd
3rd
4th
5th
6th
7th
8th
Early Childhood
Elementary School
Middle School
Resource Type
Worksheets
Games
Lesson Plans
Interactive Worksheets
Exercises
Offline Games
Teacher Editions
Occasion
St. Patrick's Day
Spring
Easter
Summer
Fall
Halloween
Holidays
Thanksgiving
Christmas
Hanukkah
Valentine's Day
Common Core
Yes
Game Type
Crossword
Puzzles & Sudoku
Coloring
Yes
English Language Support
Yes
Clear all
View 368 results
1st Grade Common Core Addition Resources for '1-20'
Filters
368 results
Search for: 1-20
✕
Math
✕
1st Grade
✕
Common Core
✕
Clear all
368 results
Number Line 1-20
Worksheet
Number Line 1-20
First Grade
Addition
Use this number line as a tool to practice adding and subtracting within 20.
Worksheet
Number Line 1-20
Worksheet
Number Line 1-20
Use this number line as a tool to practice adding and subtracting within 20.
First Grade
Addition
Worksheet
Water Rafting: Compose Numbers to Make 20 (Game 1)
Game
Water Rafting: Compose Numbers to Make 20 (Game 1)
First Grade
Addition
Children race down the river and across the finish line by choosing the equations that make 20.
Game
Water Rafting: Compose Numbers to Make 20 (Game 1)
Game
Water Rafting: Compose Numbers to Make 20 (Game 1)
Children race down the river and across the finish line by choosing the equations that make 20.
First Grade
Addition
Game
Treasure Diving: Compose Numbers to Make 20 (Game 1)
Game
Treasure Diving: Compose Numbers to Make 20 (Game 1)
First Grade
Addition
Find the sum of 12 plus 8 and other combinations that make 20 in this online diving adventure.
Game
Treasure Diving: Compose Numbers to Make 20 (Game 1)
Game
Treasure Diving: Compose Numbers to Make 20 (Game 1)
Find the sum of 12 plus 8 and other combinations that make 20 in this online diving adventure.
First Grade
Addition
Game
Addition to 20
Worksheet
Addition to 20
First Grade
Addition
Add it up! Assess your students’ understanding of addition by having them solve addition problems within 20.
Worksheet
Addition to 20
Worksheet
Addition to 20
Add it up! Assess your students’ understanding of addition by having them solve addition problems within 20.
First Grade
Addition
Worksheet
Spring Into Addition! One-Digit Addition Practice
Interactive Worksheet
Spring Into Addition! One-Digit Addition Practice
First Grade
Addition
Learners will take on 20 one-digit addition problems in this sweet springtime worksheet.
Interactive Worksheet
Spring Into Addition! One-Digit Addition Practice
Interactive Worksheet
Spring Into Addition! One-Digit Addition Practice
Learners will take on 20 one-digit addition problems in this sweet springtime worksheet.
First Grade
Addition
Interactive Worksheet
Missing Number Addition to 20
Interactive Worksheet
Missing Number Addition to 20
First Grade
Addition
Gain expertise with addition sentences within 20 in this helpful math worksheet!
Interactive Worksheet
Missing Number Addition to 20
Interactive Worksheet
Missing Number Addition to 20
Gain expertise with addition sentences within 20 in this helpful math worksheet!
First Grade
Addition
Interactive Worksheet
Addition Facts Within 20
Exercise
Addition Facts Within 20
First Grade
Addition
Limit addition to within 20 for students new to two digit addition in this engaging exercise.
Exercise
Addition Facts Within 20
Exercise
Addition Facts Within 20
Limit addition to within 20 for students new to two digit addition in this engaging exercise.
First Grade
Addition
Exercise
Bubble Buster: Addition to 20
Game
Bubble Buster: Addition to 20
First Grade
Addition
Kids must move fast to find addition pairs that total a target sum within 20.
Game
Bubble Buster: Addition to 20
Game
Bubble Buster: Addition to 20
Kids must move fast to find addition pairs that total a target sum within 20.
First Grade
Addition
Game
Addition to 20 Check-in
Interactive Worksheet
Addition to 20 Check-in
First Grade
Addition
It's time to check those addition skills! Use this to assess your student’s abilities to add within 20.
Interactive Worksheet
Addition to 20 Check-in
Interactive Worksheet
Addition to 20 Check-in
It's time to check those addition skills! Use this to assess your student’s abilities to add within 20.
First Grade
Addition
Interactive Worksheet
Roadblock: Addition Within 20
Game
Roadblock: Addition Within 20
First Grade
Addition
To help Roly move through obstacles, kids learn a regrouping strategy to make addition within 20 easily!
Game
Roadblock: Addition Within 20
Game
Roadblock: Addition Within 20
To help Roly move through obstacles, kids learn a regrouping strategy to make addition within 20 easily!
First Grade
Addition
Game
Making 10 and 20 Using Addition
Interactive Worksheet
Making 10 and 20 Using Addition
First Grade
Addition
Master the math of making 10 and 20 with two addends in this helpful addition worksheet!
Interactive Worksheet
Making 10 and 20 Using Addition
Interactive Worksheet
Making 10 and 20 Using Addition
Master the math of making 10 and 20 with two addends in this helpful addition worksheet!
First Grade
Addition
Interactive Worksheet
Adding Within 20 Using Ten Frames
Worksheet
Adding Within 20 Using Ten Frames
First Grade
Addition
Add numbers within 20 using ten frames with this first-grade math worksheet!
Worksheet
Adding Within 20 Using Ten Frames
Worksheet
Adding Within 20 Using Ten Frames
Add numbers within 20 using ten frames with this first-grade math worksheet!
First Grade
Addition
Worksheet
Assessment: Addition to 20
Worksheet
Assessment: Addition to 20
First Grade
Addition
It's time to check in on those addition skills! Use this math activity to assess your students’ understanding of addition by having them solve addition problems within 20.
Worksheet
Assessment: Addition to 20
Worksheet
Assessment: Addition to 20
It's time to check in on those addition skills! Use this math activity to assess your students’ understanding of addition by having them solve addition problems within 20.
First Grade
Addition
Worksheet
Adding Within 20 Using Ten Frames: Missing Numbers
Worksheet
Adding Within 20 Using Ten Frames: Missing Numbers
First Grade
Addition
Practice finding missing numbers while adding within 20 using ten frames!
Worksheet
Adding Within 20 Using Ten Frames: Missing Numbers
Worksheet
Adding Within 20 Using Ten Frames: Missing Numbers
Practice finding missing numbers while adding within 20 using ten frames!
First Grade
Addition
Worksheet
Addition Squares to 20 #1
Interactive Worksheet
Addition Squares to 20 #1
First Grade
Addition
Practice addition while solving number puzzles in this engaging worksheet for first and second graders!
Interactive Worksheet
Addition Squares to 20 #1
Interactive Worksheet
Addition Squares to 20 #1
Practice addition while solving number puzzles in this engaging worksheet for first and second graders!
First Grade
Addition
Interactive Worksheet
Thanksgiving Addition #1
Interactive Worksheet
Thanksgiving Addition #1
First Grade
Addition
Children practice addition within 20 in this fall-themed math worksheet.
Interactive Worksheet
Thanksgiving Addition #1
Interactive Worksheet
Thanksgiving Addition #1
Children practice addition within 20 in this fall-themed math worksheet.
First Grade
Addition
Interactive Worksheet
Valentine's Day Puzzle: Addition and Subtraction Within 20
Interactive Worksheet
Valentine's Day Puzzle: Addition and Subtraction Within 20
First Grade
Addition
Practice addition and subtraction within 20 with this sweet Valentine’s Day math puzzle!
Interactive Worksheet
Valentine's Day Puzzle: Addition and Subtraction Within 20
Interactive Worksheet
Valentine's Day Puzzle: Addition and Subtraction Within 20
Practice addition and subtraction within 20 with this sweet Valentine’s Day math puzzle!
First Grade
Addition
Interactive Worksheet
Treasure Diving: Compose Numbers to Make 20 (Game 3)
Game
Treasure Diving: Compose Numbers to Make 20 (Game 3)
First Grade
Addition
In this energizing math game, think about how different numbers can add up to 20.
Game
Treasure Diving: Compose Numbers to Make 20 (Game 3)
Game
Treasure Diving: Compose Numbers to Make 20 (Game 3)
In this energizing math game, think about how different numbers can add up to 20.
First Grade
Addition
Game
Treasure Diving: Compose Numbers to Make 20 (Game 2)
Game
Treasure Diving: Compose Numbers to Make 20 (Game 2)
First Grade
Addition
Compose numbers to make 20 and build first grade addition skills in each round of this online game.
Game
Treasure Diving: Compose Numbers to Make 20 (Game 2)
Game
Treasure Diving: Compose Numbers to Make 20 (Game 2)
Compose numbers to make 20 and build first grade addition skills in each round of this online game.
First Grade
Addition
Game
Water Rafting: Compose Numbers to Make 20 (Game 3)
Game
Water Rafting: Compose Numbers to Make 20 (Game 3)
First Grade
Addition
Children use their mental math skills to determine which equations add up to 20 in this math game.
Game
Water Rafting: Compose Numbers to Make 20 (Game 3)
Game
Water Rafting: Compose Numbers to Make 20 (Game 3)
Children use their mental math skills to determine which equations add up to 20 in this math game.
First Grade
Addition
Game
St. Patrick's Day Puzzle: Addition and Subtraction Within 20
Interactive Worksheet
St. Patrick's Day Puzzle: Addition and Subtraction Within 20
First Grade
Addition
Learners practice addition and subtraction within 20 in this St. Patrick's Day-themed math puzzle!
Interactive Worksheet
St. Patrick's Day Puzzle: Addition and Subtraction Within 20
Interactive Worksheet
St. Patrick's Day Puzzle: Addition and Subtraction Within 20
Learners practice addition and subtraction within 20 in this St. Patrick's Day-themed math puzzle!
First Grade
Addition
Interactive Worksheet
Finding True Number Sentences Maze #1
Interactive Worksheet
Finding True Number Sentences Maze #1
First Grade
Addition
Engage young learners with this fun math maze featuring addition and subtraction facts within 20!
Interactive Worksheet
Finding True Number Sentences Maze #1
Interactive Worksheet
Finding True Number Sentences Maze #1
Engage young learners with this fun math maze featuring addition and subtraction facts within 20!
First Grade
Addition
Interactive Worksheet
Adding One
Interactive Worksheet
Adding One
First Grade
Addition
Practice adding one to numbers within 10 with this first-grade addition worksheet!
Interactive Worksheet
Adding One
Interactive Worksheet
Adding One
Practice adding one to numbers within 10 with this first-grade addition worksheet!
First Grade
Addition
Interactive Worksheet
Treasure Diving: Addition Missing Addends Within 20 (Game 1)
Game
Treasure Diving: Addition Missing Addends Within 20 (Game 1)
First Grade
Addition
Dive for treasure and missing factors in this online game featuring addition equations.
Game
Treasure Diving: Addition Missing Addends Within 20 (Game 1)
Game
Treasure Diving: Addition Missing Addends Within 20 (Game 1)
Dive for treasure and missing factors in this online game featuring addition equations.
First Grade
Addition
Game
Practice One-Digit Addition 1
Worksheet
Practice One-Digit Addition 1
First Grade
Addition
Give your first grader's math skills a boost with this delightful worksheet that asks them to complete a collection of one-digit addition problems.
Worksheet
Practice One-Digit Addition 1
Worksheet
Practice One-Digit Addition 1
Give your first grader's math skills a boost with this delightful worksheet that asks them to complete a collection of one-digit addition problems.
First Grade
Addition
Worksheet
1 Minute Math: Addition
Interactive Worksheet
1 Minute Math: Addition
First Grade
Addition
Ready, set, go! Start the timer and get going on this one-minute math addition practice.
Interactive Worksheet
1 Minute Math: Addition
Interactive Worksheet
1 Minute Math: Addition
Ready, set, go! Start the timer and get going on this one-minute math addition practice.
First Grade
Addition
Interactive Worksheet
Math Lab Addition #2
Worksheet
Math Lab Addition #2
First Grade
Addition
Not only can your child practice her math facts with numbers between 1 and 20, she'll also practice writing addition problems with the correct symbols.
Worksheet
Math Lab Addition #2
Worksheet
Math Lab Addition #2
Not only can your child practice her math facts with numbers between 1 and 20, she'll also practice writing addition problems with the correct symbols.
First Grade
Addition
Worksheet
Add Doubles to 20
Worksheet
Add Doubles to 20
First Grade
Addition
Double your knowledge of doubles with the help of this inviting addition worksheet!
Worksheet
Add Doubles to 20
Worksheet
Add Doubles to 20
Double your knowledge of doubles with the help of this inviting addition worksheet!
First Grade
Addition
Worksheet
Addition Adventures to 20
Interactive Worksheet
Addition Adventures to 20
First Grade
Addition
Achieve addition mastery in this engaging math quest!
Interactive Worksheet
Addition Adventures to 20
Interactive Worksheet
Addition Adventures to 20
Achieve addition mastery in this engaging math quest!
First Grade
Addition
Interactive Worksheet
Abracadabra: Addition to 20
Interactive Worksheet
Abracadabra: Addition to 20
First Grade
Addition
It’s not magic, it’s math! Practice finding correct sums to addition problems in this inviting worksheet.
Interactive Worksheet
Abracadabra: Addition to 20
Interactive Worksheet
Abracadabra: Addition to 20
It’s not magic, it’s math! Practice finding correct sums to addition problems in this inviting worksheet.
First Grade
Addition
Interactive Worksheet
1
2
3
4
…
13
