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2nd Grade Base 10 Resources

29 2nd grade base 10 resources: 19 worksheets, 7 activities, 2 Common Core Lessons and more. How teachers use these

2nd Grade Base 10 Resources

29 2nd grade base 10 resources: 19 worksheets, 7 activities, 2 Common Core Lessons and more. How teachers use these

Game
Game2nd GradeDetermining Place Value Game

A 2nd grade place value game where Penny asks how many hundreds, tens and ones are in each number and kids tap the right gumball, then watch the number built in candy flats, rods and gumdrops. Play online on any phone, tablet, Chromebook or computer.

Worksheet
Worksheet2nd GradeBase 10 Blocks Place Value Worksheet

This Base 10 Blocks Place Value Worksheet helps 2nd graders count the hundreds, tens, and ones shown with base ten blocks and write each three-digit number. Answer key included for quick, no-prep place value practice.

Activity
Activity2nd GradePrintable Base 10 Blocks

This Printable Base 10 Blocks worksheet gives 2nd graders cut-out hundreds, tens, and ones blocks to build numbers by hand — a no-prep, hands-on way to make place value, counting, and addition click.

Micro Lesson
Micro Lesson2nd GradeDetermining Place Value Micro Lesson

Lexy teaches kids how to find the hundreds, tens and ones in a number, one step at a time. Kids practice with friendly hints, then show what they know in a 5-question quiz. Quiz scores go to HFT Classroom automatically.

Worksheet
Worksheet2nd GradeDetermining Place Value Worksheet

A determining place value worksheet where 2nd graders read three-digit numbers and write the hundreds, tens, and ones in each. Includes a complete answer key — great for quick, no-prep place value practice.

Worksheet
Worksheet2nd GradeAdd and Subtract 10 and 100 Worksheet

This Add and Subtract 10 and 100 Worksheet gives 2nd Grade students mental math practice with tens and hundreds, number patterns, and two word problems. An answer key is included, so checking work takes seconds.

Activity
Activity2nd GradeFinding 10 More 10 Less Activity

This finding 10 more 10 less activity helps 1st and 2nd grade children use a hundred chart to find 10 more and 10 less. Practice page and answer key included.

Worksheet
Worksheet2nd GradeHundreds, Tens, Ones Place Value Chart

A reusable Hundreds, Tens, Ones place value chart worksheet for 2nd grade. Students write the digits of each number in the hundreds, tens, and ones columns to build place value skills.

Assessment
Assessment2nd GradeSecond Grade Math Skills Test Practice

This second grade math skills test practice worksheet asks students to choose the plus, minus, greater than, less than, or equal sign that makes each number sentence true. An answer key is included, so checking work takes seconds.

Worksheet
Worksheet2nd GradeHundreds Tens and Ones Worksheet

A hundreds tens and ones worksheet where 2nd graders read three-digit numbers and count base-ten blocks to name each digit’s value. Includes an answer key for fast, no-prep place value practice.

Worksheet
Worksheet2nd GradeAdd and Subtract 10 and 100 Word Problems Worksheet

Practice this add and subtract 10 and 100 word problems worksheet with three number stories and a 10 more, 10 less, 100 more, 100 less chart. Built for 2nd Grade with an answer key included, so mental math clicks fast.

Worksheet
Worksheet2nd GradeIdentify Place Value Worksheet

The Identify Place Value Worksheet gives 2nd Grade students base ten block models, three-digit numbers, and a word problem to break apart into hundreds, tens, and ones. Answer key included, so practice checks itself.

Worksheet
Worksheet2nd GradeMentally Adding 10 or 100 Worksheet

This mentally adding 10 or 100 worksheet gives 2nd graders six equations, four bubble-in items, and a story problem using numbers from 100 to 900. Answer key included for quick, no-prep place value practice.

Worksheet
Worksheet2nd GradeUsing Base 10 Numerals Worksheet

This using base 10 numerals worksheet has 2nd graders count base ten blocks and write each number as a numeral, in expanded form, and in words. An answer key is included for easy checking.

Worksheet
Worksheet2nd GradePlace Value Dice Game

Roll, build, and compare three-digit numbers with this place value dice game worksheet. Second graders read dice in a hundreds, tens, and ones chart, write expanded form, and compare two numbers. Answer key included for fast, no-prep practice.

Worksheet
Worksheet2nd GradePlace Value Matching Worksheet

This Place Value Matching Worksheet has 2nd graders match base ten blocks to three-digit numbers, then break numbers into expanded form. An answer key is included, so it is ready for independent practice or a quick review.

Worksheet
Worksheet2nd GradeWriting Out Three Digit Numbers Worksheet

A writing out three digit numbers worksheet for 2nd grade: students write the number name for each numeral, then write the numeral for each number name. Answer key included for fast, no-prep place value practice.

Worksheet
Worksheet2nd GradeTens and Ones Adding Worksheet

This Tens and Ones Adding Worksheet gives 2nd graders six column problems and two word problems that line up tens and ones with no regrouping. An answer key is included for fast place value practice.

Worksheet
Worksheet2nd GradeI Can Count to One Thousand by Fives Worksheet

This I Can Count to One Thousand by Fives Worksheet gives 2nd Grade students six number rows to complete by counting up by five, with eighteen boxes to fill in and an answer key included.

Worksheet
Worksheet2nd GradeMentally Subtracting 10 or 100 Worksheet

This Mentally Subtracting 10 or 100 Worksheet gives 2nd Grade students eight quick number problems and two story problems, with an answer key included, so they build fast and confident place value thinking.

From our teachers' playbook

Ten ones make a ten, every time!

What do 2nd graders learn about base 10?

Base 10 is the idea behind our whole number system: ten of one unit make one of the next. In 2nd grade, kids learn that ten ones make a ten and ten tens make a hundred. They use base 10 blocks to show three-digit numbers, then add and subtract 10 or 100 in their heads: 456 + 100 = 556. They notice that only one digit changes, which is the big reveal. They also write numbers in standard form, word form and expanded form. The click moment is when kids can say "just change the tens digit" before they even pick up a pencil.

Our favorite ways to teach base 10

Base 10 gets real when kids can trade, count and talk their way through it. These moves build that understanding step by step.

Trade ten for one

Play a trading game with base 10 blocks: roll a die, collect that many cubes, and every time you reach ten, trade them for a rod. Ten rods trade for a flat. Kids feel the "ten makes one" rule happen in their hands.

Why it works: kids understand an idea best when they touch it, then draw it, then write it, the order the U.S. Department of Education recommends for elementary math.

Base 10 Blocks Place Value WorksheetTry it withBase 10 Blocks Place Value WorksheetWorksheetsOpen it →

Ten more, ten less

Say a number like 347 and ask "What is ten more? What is ten less?" Partners answer out loud and explain which digit changed and why. Talking it through helps kids see the pattern instead of counting by ones.

Why it works: using clear, consistent math words out loud is one of the U.S. Department of Education's recommendations for elementary math.

Finding 10 More 10 Less ActivityTry it withFinding 10 More 10 Less ActivityActivitiesOpen it →

Mental math warm-ups

Start math with a quick mental round: add 10, add 100, subtract 10, subtract 100. Do it for two minutes a day for a few weeks. Kids get fast, and that speed carries straight into regrouping.

Why it works: the brain holds on to what it meets again and again over time; spaced practice was rated among the very best methods (Dunlosky and colleagues, 2013).

Mentally Adding 10 or 100 WorksheetTry it withMentally Adding 10 or 100 WorksheetWorksheetsOpen it →

Questions parents and teachers ask us

What is base 10 in 2nd grade math?

Base 10 means our number system groups by tens. Ten ones make a ten, and ten tens make a hundred. Second graders use this to understand three-digit numbers and add or subtract 10 and 100 mentally.

What are base 10 blocks?

They are math tools that show place value. A small cube is one, a rod is ten and a flat is one hundred. Kids build numbers with them to see what each digit is worth.

How do I help my child add 10 or 100 in their head?

Use a hundreds chart or blocks to show that adding 10 only changes the tens digit and adding 100 only changes the hundreds digit. Practice with quick questions in the car or at dinner.

Can I make base 10 blocks at home?

Yes. Use dried beans for ones and craft sticks with ten beans glued on for tens, or print paper base 10 blocks and cut them out. Any set of objects grouped in tens works.