Second Grade Numbers and Operations in Base Ten

Domain: Numbers and Operations in Base Ten
Teacher Notes/Second Grade Home/Number Talks/Read It, Draw It, Solve It
2.NBT.A.1 2.NBT.A.1.A 2.NBT.A.1.B 2.NBT.A.2 2.NBT.A.3 2.NBTA.4 2.NBT.B.5 2.NBT.B.6 2.NBT.B.7 2.NBT.B.8 2.NBT.B.9
Essential Skills and Knowledge	Teacher Resources	Student Resources
2.NBT.A.1 Understand place value.
Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, tens, and 6 ones. "I Can" Statements: I can explain that a three-digit number is represented with hundreds, tens and ones. I can explain the value of each digit in a 3-digit number. I can identify a bundle of 10 tens as a "hundred."	Curriculum: Learn Zillion: Prior to selecting the link, login to Learn Zillion Use Skip Counting to Order Class Party Supplies (T2U1Q3) Represent Three Digit Numbers (T2U1Q4) Use Number Representations (FP) (T2U1Q5) Count objects in groups of ten Identify an equal number of ones, tens, and hundreds Regroup by trading cubes, rods, and flats Model and write numbers using base ten blocks Show numbers in different ways by taking models apart Additional Resources: Place Value with Base 10 Blocks (Teacher Intro) Three Digit Place Value Place Value Place Value Forms Quiz - click link, Make a copy, select Form > Edit Form, share form with students - graded automatically Place Value Riddles Place Value Riddles: Google Slides PowerPoint Wixie: *Teachers login to Wixie, select the link, and then assign to students.* Place Value 1 Place Value 2 Place Value 3	Place Value Practice Tens and Ones Arrow Card Visual With Hundreds 2-Digit Place Value Review Place The Penguin! Place Value with Hundreds, Tens and Ones Place Value Challenge (Each Form) Base Ten Bingo Base Ten Fun Base Ten Blocks
Understand the following as special cases:
2.NBT.A.1.A Understand place value.
100 can be thought of as a bundle of tens-called a "hundred" "I Can" Statement: I can think of 100 as being a bundle of ten tens that are called a "hundred."	Curriculum: Learn Zillion: Prior to selecting the link, login to Learn Zillion. How Many Bundles Are in 100 (T2U1Q1) Think About 100 (T2U1Q2) Count objects in groups of ten Identify an equal number of ones, tens, and hundreds Regroup by trading cubes, rods, and flats Model and write numbers using base ten blocks Show numbers in different ways by taking models apart Additional Resources: Party Favors Problem	Groups of 10 Practice Base Ten Blocks - iTools (T2U1Q2) Base Ten Blocks
2.NBT.A.1.B Understand place value.
The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds and 0 tens and 0 ones. "I Can" Statements: I can explain the value of each digit in a 3-digit number. I can identify a bundle of 10 tens as a "hundred." I can represent a three digit number with hundreds, tens and ones. I can represent 200, 300, 400, 500, 600, 700, 800 and 900 with two, three, four, five, six, seven, eight or nine hundreds and 0 tens and 0 ones.	Curriculum: Learn Zillion: Prior to selecting the link, login to Learn Zillion Understand the value of digits using pictures Understand the value of a number Draw a visual representation of a 3-digit number Use expanded form to understand place value of 3-digit numbers Combine tens, ones, and hundreds to create numbers Additional Resources: Hundreds Number line Hundreds Number Line: Google Slides PowerPoint	Counting by 1's, 10's, 100's to 1000 Counting With Hundreds Problem Solving
2.NBT.A.2 Understand place value.
Count within 1000;skip-count by 5's, 10's, and 100's "I Can" Statements: I can count within 1000 from any given number. I can skip-count by 5's from any given number. I can skip-count by 10's from any given number.	Curriculum: Learn Zillion: Prior to selecting the link, login to Learn Zillion Skip Count by 5s, 10s, 100s Connect Skip Counting to Repeated Addition Use number patterns to count forwards and backwards Identify number patterns by skip-counting with base ten blocks Connect skip-counting to repeated addition using number patterns Use skip-counting to solve problems Count objects by 5s, 10s, and 100s Count money by 5s, 10s, and 100s Identify patterns when counting by 5s Identify patterns when counting by 10s Identify patterns when counting by 100s Additional Resources: Function Man Skip Count by Fives Song and Video Skip Count by 2s, 5s and 10s Song and Video	Hundreds Chart Center Counting by 2, 5 and 10 Song Balloon Pop Skip Counting Grouping and Grazing Skip Counting by Fives Video and Practice Skip Counting by Tens Video and Practice
2.NBT.A.3 Understand place value.
Read and write numbers to 1000 using base-ten numerals, number names, and expanded form. "I Can" Statements: I can recognize expanded form. I can recognize that the digits in each place represent amounts of thousands, hundreds, tens or ones. I can read numbers to 1000 using base ten numerals. I can read numbers to 1000 using number names. I can read numbers to 1000 using expanded form. I can write numbers to 1000 using base ten numerals. I can write numbers to 1000 using number names. I can write numbers to 1000 using expanded form.	Curriculum: Learn Zillion: Prior to selecting the link, login to Learn Zillion Use Base Ten Blocks to Represent Cards in a Game Write Three Digit Numbers in Word Form Model a number to find the value of digits Read numbers Write numbers in expanded form Read and write numbers by naming parts Represent a 2-digit number using a place value model Read and write numbers in expanded form using arrow cards Read and write numbers that include zero Additional Resources: Place Value Before and After Place Value Jeopardy Standard, Expanded and Word Form Expanded Word Form Adding Using Expanded Form	Shark Numbers Cookie Dough Place Value Critter Junction
2.NBT.A.4 Understand place value.
Compare two three digit numbers based on meanings of hundreds, tens, and ones digits, using >, =, and < symbols to records the results of comparisons. "I Can" Statements: I can name the value of each digit represented in a three-digit number. I can compare two three-digit numbers based on the place value of each digit. I can use >, < or = symbols to record the results of number comparisons.	Curriculum: Learn Zillion: *Prior to selecting the link, login to Learn Zillion* Compare numbers using a number chart and counting sequence Compare two 3-digit numbers by comparing number parts Compare numbers using arrow cards Compare numbers using a number line Additional Resources: Comparing with Mr. Alligator Alligator Compare! Comparing Numbers More Comparing Numbers Comparing 3-Digit Numbers Video	Place Value Practice Comparing Number Values Order Numbers to 1000 Comparing Numbers with Problem Solving One False Move Molly's More or Less Quest
2.NBT.B.5 Use place value understanding and properties of operations to add and subtract.
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. "I Can" Statements: I can identify the order in which to add three-digit numbers. I can identify properties of addition. I can identify properties of subtraction. I can identify when to regroup for addition and subtraction. I can identify the order in which to subtract three-digit numbers. I can solve an addition and subtraction problem within 100 using a selected strategy. I can add and subtract within 100 fluently.	Curriculum: Place Value Place Value Lesson Subtract on a Hundreds Chart Subtract Lesson Subtract Tens and Ones (T1U2Q11) Learn Zillion: Prior to selecting the link, login to Learn Zillion Add within 100 using base ten blocks Use Place Value (T1U2Q10) Subtract numbers within 100 using base ten blocks Add within 100 on an open number line Subtract numbers within 100 using an open number line Add two 2-digit numbers using the commutative and associative properties Subtract two 2-digit numbers by using addition Additional Resources: Add Tens Review Add 2 Digit to 1 Digit Numbers Add 2 Digit to 1 Digit Day 2 Add Multiples of Ten Subtract Multiples of Ten Find Missing Parts of 100 Subtract Using a 100 Chart Add 2-Digits Using Place Value Subtract 2-Digits Using Place Value Place Value Subtraction With Zeros Understanding Place Value When Adding Ones Understanding Place Value When Adding Tens	Place Value Race Addition and Subtraction Practice Addition Practice - Adding Ones To a Two-Digit Number Addition Practice - Adding Ones and Tens
2.NBT.B.6 Use place value understanding and properties of operations to add and subtract.
Add up to four two digit numbers using strategies based on place value and properties of operations. "I Can" Statements: I can identify strategies for adding up to four two-digit numbers based on place value. I can identify strategies for adding up to four two-digit numbers based on properties of operations. I can use strategies to add up to four two-digit numbers.	Curriculum: Learn Zillion: Prior to selecting the link, login to Learn Zillion Add using tens and near tens Add two 2-digit numbers by making 10s Add three 2-digit numbers by decomposing Add three and four 2-digit numbers by making 10s Add up to four 2-digit numbers by decomposing (sums greater than 100) Add up to four 2-digit numbers by making a ten Add up to four 2-digit numbers by using addition facts and friendly numbers Add up to four 2-digit numbers using place value Add up to four 2-digit numbers using the properties of addition Additional Resources: Subtract Tens	Soccer Adding Basketball Adding Canoe Puppies
2.NBT.B.7 Use place value understanding and properties of operations to add and subtract.
Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties, of operations, and/or the relationship between addition and subtraction: relate the strategy to written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones, and sometimes it is necessary to compose or decompose tens or hundreds. "I Can" Statements: I can choose an appropriate strategy for solving an addition or subtraction problem within 1000. I can explain how the strategy was used to write the equation. I can compose hundreds and tens when necessary to add within 1000. I can decompose hundreds and tens when necessary to subtract within 1000.	Curriculum: Learn Zillion: *Prior to selecting the link, login to Learn Zillion* Add three-digit numbers with base ten blocks Subtract three-digit numbers with base ten blocks Subtract three-digit numbers with a number line Add three-digit numbers using expanded form Subtract three-digit numbers using expanded form Subtract three-digit numbers by decomposing Add three-digit numbers by composing Add within 1000 using base 10 blocks Add within 1000 by regrouping base 10 blocks Subtract within 1000 using base 10 blocks Subtract within 1000 by decomposing Add within 1000 using a number line Subtract within 1000 using an open number line Additional Resources: Estimation Problem Solving: Google Slides PowerPoint Hundreds Chart Addition Hundreds Chart Subtraction Missing Part on a Hundreds Chart Hundreds Chart - What is Missing?	Adding Two Three digit numbers Balanced Equations with three digit numbers Hundreds Chart Number Patterns Problem Solving (PowerPoint)
2.NBT.B.8 Use place value understanding and properties of operations to add and subtract.
Mentally add 10 or 100 to given number 100-900, and mentally subtract 10 or 100 from a given number 100-900. "I Can" Statements: I can apply knowledge of place value to mentally add 10 to a given number from 100-900. I can apply knowledge of place value to mentally add 100 to a given number from 100-900. I can apply knowledge of place value to mentally subtract 10 from a given number between 100-900. I can apply knowledge of place value to mentally subtract 100 from a given number between 100-900.	Curriculum: Learn Zillion: *Prior to selecting the link, login to Learn Zillion* Add 10 to a number using ten frames and a hundreds chart Subtract 10 from a number using ten frames and a hundreds chart Add or subtract 10 using a numbers chart and place value model Add and subtract 10 with regrouping by using a place value model Add and subtract multiples of 10 from a number using a numbers chart Add and subtract 100 from a number using place value Add using expanded notation Subtract using expanded notation Add multiples of 100 to a number using a number line Subtract multiples of 100 from a number using a number line Mentally add 10 or 100 visualizing base ten blocks Mentally subtract 10 or 100 using base ten blocks Mentally add or subtract 10 using a hundreds chart Mentally add or subtract 10 or 100 using expanded form Add 10 across a hundred using base ten blocks Subtract 10 across a hundred using base ten blocks Additional Resources: Mentally Subtract Multiples of Ten Subtract Multiples of Ten Dimes and Pennies Subtraction	Add 10 Sub Challenge 10 More 100 Hunt Minus 10 10 more or 10 less
2.NBT.B.9 Use place value understanding and properties of operations to add and subtract.
Explain why addition and subtraction strategies work, using place value and the properties of operations. "I Can" Statements: I can explain why addition strategies based on place value work. I can explain why addition strategies based on properties of operations work. I can explain why subtraction strategies based on place value work. I can explain why subtraction strategies based on properties of operations work.	Curriculum: Learn Zillion: *Prior to selecting the link, login to Learn Zillion* Explain an addition number sentence Explain a subtraction number sentence Additional Resources: Discovery: Prior to selecting the link, login to Discovery Education (aacps.discoveryeducation.com) Fact Families Subtraction Using Fact Families, Regrouping, Column Subtraction and More! Cluster 5 Review Place Value Problem Solving Estimate and Find the Difference Missing Information Cupcakes Adding and Subtracting on a Number Line Introduction	A Math Dictionary for Kids Adding and Subtracting on a Number Line Word Problems: Addition/Subtraction Strategies Within 100 "More or Fewer" Problem Solving Within 100
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Teacher Notes

Numbers and Operations in Base Ten	Website/Activity	Content Standards/Technology Standards
Understand place value.	Tens and Ones Place Value with Base 10 Blocks (2-digits) Three Digit Place Value Place Value Place Value Riddles Learn Zillion Videos Wixie: Place Value 1 Place Value 2 Place Value 3 Student Centers: 3 Hundreds Chart Fish Arrow Card Visual With Hundreds Place The Penguin Two-Digit Place Value Review Learn Zillion: Understand three-digit place value by drawing and modeling Place Value with Hundreds, Tens and Ones	Common Core: 2.NTB.1 Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
	Special Cases LearnZillion Videos (Student Centers) Counting by 1's, 10's, 100's, to 1000 Learn Zillion: Understand three-digit place value by counting, grouping, and using base ten blocks Groups of 10 Practice	Common Core: NBT.A.1.A Understand Place Value The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one , two, three, four, five, six, seven, eight, or nine hundreds and 0 tens and 0 ones Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
	Hundreds Number Line Understanding 3-Digit Place Value By Drawing and Modeling LearnZillion Videos (Student Centers) Counting With Hundreds Problem Solving	Common Core: The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds and 0 tens and 0 ones. Technology Standard: 3.0-Technology for Learning and Collaboration: Students will use a variety of technologies for learning and collaboration.
	LearnZillion Videos Shark Numbers Counting by 2s, 5s, and 10s Song Hundred Chart Center Hundred Chart Number Patterns Function Man Skip Count by Fives - Song and Video Skip Count by 2s, 5s and 10s - Song and Video LearnZillion: Use patterns and strategies to skip-count within 1,000 Understand skip-counting and its connection to repeated addition and number patterns (Student Centers) Balloon Pop Skip Counting Grouping and Grazing Skip Counting - Start At Any Number Skip Counting By Fives Video and Practice Skip Counting By Tens Video and Practice	Common Core: 2.NTB.2 Count within 1000; skip count by 5s, 10s, and 100s. Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
	Place Value LearnZillion Videos Before and After Place Value Jeopardy Standard, Expanded and Word Form Expanded Word Form Adding Using Expanded Form (Student Centers) Shark Numbers Cookie Dough Three Digit Place Value LearnZillion:Read and write numbers to 1000 (Part 1) Read and write numbers to 1,000 (Part 2) Place Value Challange (Each Form) Critter Junction	Common Core: 2.NTB.3 Read and write numbers to 1000 using base-ten numerals, number names, and expanded form. Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
	LearnZillion Videos Comparing with Mr. Alligator Compare two 3-digit numbers and record the results Alligator Compare! Comparing Numbers More Comparing Numbers Comparing 3-Digit Numbers Video (Student Centers) Comparing Number Values Comparing number values Order Numbers to 1000 Comparing Numbers with Problem Solving One False Move	Common Core: 2.NTB.4. Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
		Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
Use place value understanding and properties of operations to add and subtract.	Add and subtract within 100 using base ten blocks, number lines, and properties of operations LearnZillion Videos Add Tens Review Add 2 digit to a 1 digit day 1 Add 2 digit to a 1 digit day 2 Add multiples of Ten Subtract Multiples of 10 Find Missing parts of 100 Use a 100's Chart Add 2-digits using place value Subtract 2-digits using place value Place Value Subtraction WIth Zeros Understanding Place Value When Adding Ones Understanding Place Value When Adding Tens and Ones (Student Centers) Addition and Subtraction Practice Addition Practice When Adding Ones to a Two-Digit Number Addition Practice When Adding Tens and Ones	Common Core: 2.NTB.5. Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
	Add two-digit numbers by decomposing numbers and making tens Add up to four two-digit numbers using place value and properties of operations LearnZillion Videos Subtract Tens (Student Center)Adding 3 Two-Digit Numbers	Common Core: 2.NTB.6. Add up to four two-digit numbers using strategies based on place value, properties of operations. Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
	Use models and drawing strategies to add and subtract within 1000 Add and subtract within 1000 LearnZillion Videos Hundreds Chart Addition Hundreds Chart Subtraction Missing Part on a Hundreds Chart Hundreds Chart - What is Missing? (Student Centers) Adding two three digit numbers Balanced equations with three digit numbers Hundreds Chart Problem Solving Place Value Problem Solving	Common Core: 2.NTB.7 Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds. Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
	Add or subtract 10 from a number within 1000 Mentally add or subtract 10 or 100 from a number within 1000 Mentally add and subtract 10 or 100 LearnZillion Videos Adding 10 to Any Number Add 10 Sub Challenge 10 More Subtract 10 100 Hunt Minus 10 Dimes and Pennies Subtraction	Common Core: 2.NBT.8 Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900. Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor
	Explain addition and subtraction strategies LearnZillion Videos Cluster 5 Review How to Do (Almost) Anything in Math Estimate and Find the Difference Missing Information Cupcakes Adding and Subtracting on a Number Line Introduction (Student Centers) A Math Dictionary for Kids Adding and Subtracting on a Number Line Word Problems: Addition/Subtraction Strategies Within 100 "More and Fewer" Problem Solving Within 100	Common Core: 2.NBT.9 Explain why addition and subtraction strategies work, using place value and the properties of operations. Technology \| ISTE Standards Addressed: 1. Empowered Learner; 3. Knowledge Constructor

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