Embedded Files
Unit 3: Numbers Within 1,000: Place Value, Addition, and Subtraction
Lesson 12:
Understand Three-Digit Numbers
Content Objectives
🎯 I can identify ones, tens, and hundreds in a three-digit number.
🎯 I can interpret models to determine the combinations of hundreds, tens, and ones in a number.
🎯 I can write a three-digit number in terms of varied combinations of hundreds, tens, and ones.
2.NBT.A.1 Priority
Understand that the three digits of a three-digit number represents amounts of hundreds, tens, and ones.
2.NBT.1.a. Priority
100 can be thought of as a bundle of ten tens — called a “hundred.”
2.NBT.1.b. Priority
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).
Prior Knowledge
Count to 100.
Count by tens and hundreds.
Understand the concept of place value in two-digit numbers.
👉Teacher Present Link👈Session 3 modified slides
Vocabulary 2-up pdf (I added how we draw ones, tens, hundreds too)
Lesson 12 Quiz with Rubric pdf
Seesaw Activity Game for 2 uses 2-digit numbers
Seesaw Activity Mini-lesson on drawing base-ten blocks to represent 3 digit numbers and then practice pages.
Sticker Reveal Slides Activity
share with students via Classroom
Seesaw Activity Students "read" Base Ten Blocks, type in standard, word, and expanded form, and represent the number with a quick sketch.
Seesaw Activity 2- and 3-digit number clues to solve puzzles. Self-checking.
Lesson 13:
Read and Write Three-Digit Numbers
Content Objectives
🎯 I can identify the place value of each digit in a three-digit number.
🎯 I can model 3-digit numbers.
🎯 I can interpret a model and write the number value.
2.NBT.A.3 Supporting
Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
Prior Knowledge
Understand two-digit numbers.
Count by tens and hundreds.
Add two-digit numbers.
Mystery Pixel Picture (it's Pikachu!)
Share a copy to each student via Classroom. They may need to reduce the size to see it all when finished.
Lesson 14:
Compare Three-Digit Numbers
Content Objectives
🎯 I can compare to determine whether three-digit numbers are greater than, less than, or equal to each other.
🎯 I can express equalities and inequalities using proper notation.
🎯 I can solve problems involving inequalities and justify solutions.
2.NBT.A.4 Supporting
Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits using >, =, and < symbols to record the results of comparisons.
Prior Knowledge
Identify place-value in numbers.
Model three-digit numbers.
Understand the concepts of greater than, less than, and equal to.
Self-Checking Seesaw Activity
Choose your level: 3- or 7-digit numbers Seesaw Activity (optional recording sheet attached)
Seesaw Activity game for 1, 2 or small group
Lesson 15:
Mental Addition and Subtraction
Content Objectives
🎯 I can skip-count by hundreds within 1,000 to add and subtract.
🎯 I can skip-count by fives and tens from two- and three-digit numbers.
🎯 I can mentally add 10 or 100 to a given number 100-900.
🎯 I can mentally subtract 10 or 100 from a given number 100-900.
2.NBT.A.2 (MT) Supporting
Count within 1000; skip-count by 5s, 10s, and 100s.
2.NBT.B.8 Supporting
Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
Prior Knowledge
Fluently add and subtract two-digit numbers.
Identify the place value of each digit in a three-digit number.
Model three-digit numbers.
Interpret models for three-digit numbers and write their values.
Lightning McQueen Picture Reveal!
As students answer + or - 10 or 100 correctly, another piece of the picture shows up! Copy this template and share via Classroom. (Kids will need to do problems in the presented order for this one to work.)
Seesaw Activity coming
Lesson 16:
Add Three-Digit Numbers
Content Objectives
🎯 I can break apart three-diigit numbers as a place-value strategy for adding.
🎯 I can recognize that in addition, hundreds are added to hundreds, tens are added to tens, and ones are added to ones.
🎯 I can determine when regrouping a hundred or ten is necessary and carry out the regrouping to find the sum.
2.NBT.B.7 Priority
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.
2.NBT.B.9 Supporting
Explain why addition and subtraction strategies work, using place value and the properties of operations.
Prior Knowledge
Identify place value in three-digit numbers.
Model three-digit numbers.
Perform two-digit addition with and without regrouping.
Seesaw Activity
Enrichment
Seesaw Activity Competitive Don't Break the Bank for 2 players on 1 computer
Seesaw Activity coming
Lesson 17:
Subtract Three-Digit Numbers
Content Objectives
🎯 I can determine when regrouping a ten or a hundred is necessary to subtract, and carry out the regrouping to find the difference.
🎯 I can recognize that in subtraction, hundreds are subtracted from hundreds, tens are subtracted from tens, and ones are subtracted from ones.
🎯 I can explore subtraction as a process of taking away or adding up.
2.NBT.B.7 Priority
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.
2.NBT.B.9 Supporting
Explain why addition and subtraction strategies work, using place value and the properties of operations.
Prior Knowledge
Identify place value in 3-digit numbers.
Model 3-digit numbers.
Perform 2-digit addition with and without regrouping.
Lesson 18:
Use Addition & Subtraction Strategies with 3-Digit Numbers
Content Objectives
🎯 I can fluently break apart 3-digit numbers as a strategy for addition and subtraction.
🎯 I can fluently determine when regrouping ones or tens is necessary and carry out the regrouping to find a sum.
🎯 I can fluently determine when decomposing tens or hundreds is necessary and carry out the decomposition to find a difference.
🎯 I can subtract from 3-digit numbers with zeros in the one and/or tens places.
🎯 I can use addition to check the solution to a subtraction problem.
2.NBT.B.7 Priority
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.
2.NBT.B.9 Supporting
Explain why addition and subtraction strategies work, using place value and the properties of operations.
Prior Knowledge
Identify place value in 3-digit numbers.
Model 3-digit numbers.
Perform 2-digit addition with and without regrouping.
Perform 2-digit subtraction with and without regrouping.
Lesson 19:
Add Several 2-Digit Numbers
Content Objectives
🎯 I can break apart three or more numbers as a place-value strategy for adding.
🎯 I can use strategies for adding more than two numbers.
🎯 I can apply the commutative and associate properties of addition.
2.NBT.B.2 Supporting
Count within 1000; skip-count by 5s, 10s, and 100s.
2.NBT.B.9 Supporting
Explain why addition and subtraction strategies work, using place value and the properties of operations.
Prior Knowledge
Identify place-value in two-digit numbers.
Model two-digit numbers in expanded form.
Perform two-digit addition with and without regrouping.
Use addition facts fluently.
Vocabulary
Seesaw Activity - a game for 2 players on 1 computer
Seesaw Activity coming
Seesaw Activity coming
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