We will compare three-digit numbers using symbols 1

CCSS 2nd Grade Numbers and Operations in Base Ten 4.0Compare two three-digit numbers based on meanings of

the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.

Lesson to be used by EDI-trained teachers only.

READY TO TEACHSM EDI® Lessons©2013 All rights reserved.

We will compare three-digit numbers using symbols1.

What are we going to do?

What are symbols?Symbols are __________.

What are we going to do?

What are symbols?Symbols are __________.

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Students, you already know how to find the value of a digit by knowing its position in a number. Now, we will use place value to compare three-digit numbers using symbols.

Students, you already know how to find the value of a digit by knowing its position in a number. Now, we will use place value to compare three-digit numbers using symbols.

Make ConnectionMake Connection

1 shapes that stand for something1 shapes that stand for something

VocabularyVocabulary

NameLearning Objective

Learning Objective

Activate Prior Knowledge

Activate Prior Knowledge

Place value: The place is the position of a digit in a number. The value is the worth of the digit due to its

position.

1. What is the value of the 2 in 271?

2. What is the value of the 3 in 321?

CCSS 2nd Grade Numbers and Operations in Base Ten 4.0Compare three-digit numbers using symbols.

Lesson to be used by EDI-trained teachers only. ©2013 All rights reserved.

Why is the number 367 less than the number 461?

A It has less ones. B It has less tens. C It has less hundreds.

Why is the number 367 less than the number 461?

A It has less ones. B It has less tens. C It has less hundreds.

CFU 1 CFU 1

Why is the number 725 greater than the number 721?

A It has more ones. B It has more tens. C It has more hundreds.Explain why the number 634 is equal to the number 634.

In your own words, what does it mean to compare numbers?To compare numbers _______.

Why is the number 725 greater than the number 721?

A It has more ones. B It has more tens. C It has more hundreds.Explain why the number 634 is equal to the number 634.

In your own words, what does it mean to compare numbers?To compare numbers _______.

CFU 2CFU 2

2 figure out2 figure out


Concept DevelopmentConcept Development

To compare numbers means to determine2 whether a number is less than, greater than, or equal to another number.

Comparing Numbers

less than

greater than

equal to

252 321252 has less hundreds than 321.

252 271252 has the same hundreds

as 271 but less tens.

252 252252 has the same hundreds,

tens and ones as 252.

Go to Skill Dev 1

Go to Skill Dev 2

321 252321 has more hundreds than 252.

321 320321 has the same hundreds and

tens as 320 but more ones.



How did I/you compare each digit in the numbers?How did I/you know which symbol to write?


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12

3 find4 explain

3 find4 explain


Compare three-digit numbers using symbols. 1 Compare each digit in the numbers, starting at the highest place value.

If digits are different, identify3 the smaller digit. (underline)If digits are the same, continue to the next lower place value.

Write the correct symbol.Interpret4 your answer.

a

23

b

Skill Development/Guided Practice 1


To compare numbers means to determine whether a number is less than, greater than, or equal to another number.

1.

379 456

because ___________________________.

2.

168 231

because ___________________________.

3.

142 145

because ___________________________.

4.

248 267

because _________________________.



Skill Development/Guided Practice 1 (continued)




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12


If digits are different, identify the smaller digit. (underline)If digits are the same, continue to the next lower place value.

Write the correct symbol.Interpret your answer.

a

23

b


5.

480 554

because ___________________________.

6.

678 804

because ___________________________.

7.

422 435

because ___________________________.

8.

340 349

because __________________________.





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12




a

23

b




1.

251 123

because ___________________________.

2.

235 184

because ___________________________.

3.

179 173

because ___________________________.

4.

237 227

because _________________________.







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12




a

23

b


5.

126 126

because ___________________________.

6.

173 173

because ___________________________.

7.

774 623

because ___________________________.

8.

395 393

because ___________________________.



Comparing numbers will help you know which amount is more or less.

Comparing numbers will help you do well on tests.

1

Does anyone else have another reason why it is relevant to compare numbers using symbols? (Pair-Share) Why is it relevant to compare numbers using symbols? You may give me one of my reasons or one of your own. Which reason is more relevant to you? Why?

Does anyone else have another reason why it is relevant to compare numbers using symbols? (Pair-Share) Why is it relevant to compare numbers using symbols? You may give me one of my reasons or one of your own. Which reason is more relevant to you? Why?

CFUCFU

2

RelevanceRelevance

Sample Test Question:

42. Which number makes the comparison true?

A 389 B 492 C 393 D 391

391 > ?

Which group books of would you rather carry?

or120 pounds

9pounds




Skill ClosureSkill Closure

Access Common CoreAccess Common Core

Summary ClosureSummary Closure





a

23

b

What did you learn today about comparing three-digit numbers using symbols? (Pair-Share) Use words from the word bank.

Write a number that will make the comparison true. Explain how you know the number will make the comparison true.

478 < ___

1.

249 315

because ___________________________.

2.

221 212

because ___________________________.

Word Bank

comparegreater than

less thanequal to

digitssymbol



NameIndependent Practice

Independent Practice




a

23

b


1.

258 318

because ___________________________.

2.

263 276

because ___________________________.

3.

848 903

because ___________________________.

4.

473 478

because _________________________.



Independent Practice (continued)

Independent Practice (continued)




a

23

b


5.

225 149

because ___________________________.

6.

138 132

because ___________________________.

7.

167 167

because ___________________________.

8.

993 899

because ___________________________.



NamePeriodic Review 1

Periodic Review 1

1.

246 446

because ___________________________.

2.

396 330

because ___________________________.

3.

530 460

because ___________________________.

4.

355 355

because _________________________.

5.

616 647

because ___________________________.

6.

833 831

because _________________________.



________________________________________________________________

________________________________________________________________

NameAccess Common Core

Access Common Core

1. Dona has 582 shells. Clayton has 576 shells. Who has more shells? How do you know?Show your answer using the correct symbols.

2. Melissa has 332 pennies. Leonard has 341 pennies. Who has more pennies? How do you know?Show your answer using the correct symbols.

3. Chandra has 566 stamps. Erik has 566 stamps. Who has more stamps? How do you know?Show your answer using the correct symbols.

________________________________________________________________

________________________________________________________________

________________________________________________________________

________________________________________________________________




Periodic Review 2

1.838 806

because ___________________________.

2.125 123

because ___________________________.

3.361 417

because ___________________________.

4.943 943

because _________________________.


1. Edwin said that 571 > 631 because 571 has more tens than 631.Explain why Edwin is incorrect.

2. Sophie said that 341 < 338 because 341 has less ones than 338.Explain why Sophie is incorrect.

3. Melvin said that 257 = 253 because 257 and 253 have the same hundreds and tens.Explain why Melvin is incorrect.

________________________________________________________________

________________________________________________________________

________________________________________________________________

________________________________________________________________

________________________________________________________________

________________________________________________________________




Periodic Review 3


1.323 192

because ___________________________.

2.582 579

because ___________________________.

1. Use the digits 1,5, and 7 to make a number less than 517.

_____ _____ _____

Use the digits 1,5, and 7 to make a number greater than 517.

_____ _____ _____

Use the digits 1,5, and 7 to make a number equal to 517.

_____ _____ _____


_____ _____ _____


_____ _____ _____


_____ _____ _____


_____ _____ _____


_____ _____ _____


_____ _____ _____

Documents

We will compare three-digit numbers using symbols 1