what are we going to learn? what does solve mean? solve means __________

CCSS 2nd Grade Operations and Algebraic Thinking 1.1Use addition and subtraction within 100 to solve one- and two-step word

problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and

equations with a symbol for the unknown number to represent the problem.Lesson to be used by EDI-trained teachers only.

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

What are we going to learn?

What does solve mean?Solve means __________.

What are we going to learn?

What does solve mean?Solve means __________.

CFUCFU

Students, you already know how to find the sum of an addition problem. Now, we will solve addition problems.

Students, you already know how to find the sum of an addition problem. Now, we will solve addition problems.

Make ConnectionMake Connection

Find the sum in the addition problem using a number line.

1 find the answer1 find the answer

VocabularyVocabulary

We will solve1 addition word problems. Learning Objective

Learning Objective

Activate Prior Knowledge

Activate Prior Knowledge

1. 41 + 27 =

31 + 26 = 57

addends sum

2. 23 + 15 =

Different Ways to Add Poster

CCSS 2nd Grade Operations and Algebraic Thinking 1.1Solve addition word problems.

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

An equation uses an equal sign to say two amounts are the same. •An equation can be used to represent2 an addition word problem.

The equation represents the word problem below. Explain why.

There were 37 pens in a box. 25 more pens were put in there. How many pens are in the box now?

Which equation represents the addition word problem? Explain your answer.

There were 24 pens in a box. Some more pens were put in there. Now there are 47 pens. How many pens were put in the box?

A

B

The equation represents the word problem below. Explain why.

There were 37 pens in a box. 25 more pens were put in there. How many pens are in the box now?

Which equation represents the addition word problem? Explain your answer.

There were 24 pens in a box. Some more pens were put in there. Now there are 47 pens. How many pens were put in the box?

A

B

CFUCFUAddition Word Problem

Damon had 23 marbles. He bought 15 more marbles. How many does he have now?

Equation

Concept Development Concept Development

Damon has _____ marbles now.

Sum Unknown

Damon had 23 marbles. He bought some more marbles. Now he has 38 marbles. How many did he buy?

Equation

Damon bought _____ marbles.

Addend Unknown

2 show (synonym) 2 show (synonym)




Read the problem.Write an equation to represent the problem. Solve for the unknown number using an addition strategy3. (write)

Solve addition word problems.1

23

An equation uses an equal sign to say two amounts are the same. •An equation can be used to represent an addition word problem.

How did I/you write an equation to represent the problem?How did I/you solve for the unknown number?


CFUCFU

2

3

Skill Development/Guided Practice

Skill Development/Guided Practice

1) Rosa has 34 stamps in her collection. Her mom gave her 27 more stamps. How many stamps does she have in her collection now?

2) Bob has 28 pieces of candy. He bought 15 more pieces of candy. How many pieces of candy does Bob have now?

Strategy (Drawing)

Rosa has _____ stamps in her collection now.

Equation

Bob has _____ pieces of candy now.

Strategy (Drawing)

Equation

3 a plan on how to do something3 a plan on how to do something





Skill Development/Guided Practice (continued)


3) There are 32 blue vases and 45 red vases on the shelf. How many vases are on the shelf altogether?

4) There are 17 boys and 35 girls in the cafeteria. How many kids are in the cafeteria altogether?

Strategy (Number line)

There are _____ vases on the shelf.

Equation

There are _____ kids in the cafeteria altogether.


Equation

Read the problem.Write an equation to represent the problem. Solve for the unknown number using an addition strategy. (write)


23




CFUCFU

2

3




5) There were 53 crayons in the container. Josie put some more crayons in there. Now there are 78 crayons. How many crayons did Josie put in the container?

6) There were 43 books on the shelf. Mr. Lee put some more books on there. Now there are 62 books. How many books did Mr. Lee put on the shelf?


Josie put _____________________________.

Equation

Mr. Lee put ____________________________.


Equation



23




CFUCFU

2

3








7) Some marbles were in a jar. Marcy put 16 more marbles in the jar. Then there were 29 marbles. How many marbles were in the jar before?

8) Some students were in the playground. 25 more students came there. Then there were 62 students. How many students were in the playground before?



23




CFUCFU

2

3


There were _____________________________.

Equation

There were ________________________________.


Equation




Solving addition problems will help you in a fashion designing career.

Solving addition problems will help you do well on tests.

1

Does anyone else have another reason why it is relevant to solve addition word problems? (Pair-Share) Why is it relevant to solve addition word problems? You may give 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 solve addition word problems? (Pair-Share) Why is it relevant to solve addition word problems? You may give one of my reasons or one of your own. Which reason is more relevant to you? Why?

CFUCFU

2Sample Test Question:

Mari had 47 stickers. Her dad bought her some more stickers. Then she had 62 stickers total. How many stickers did her dad buy her?

Show your work and explain how you got your answer.


RelevanceRelevance

There were 23 yards of fabric in the shop. Francis bought 16 yards more for the fashion show.



What did you learn today about solving addition word problems?(Pair-Share) Use words from the word bank.


Skill ClosureSkill Closure

Access Common CoreAccess Common Core

Summary ClosureSummary Closure

1) There were 22 kids in the library. 17 more kids came there. How many kids are in the library now?

2) There were 37 pencils in the box. Mrs. Tang put some more pencils in there. Now there are 52 pencils. How many pencils did Mrs. Tang put in the box?

Strategy (Drawing)

Equation



23


Equation

Word Bank

solvestrategyaddend

sum

There are 34 clips in a box. Some more clips were put in the box. Now there are 47 clips in the box. How many clips were put in the box?Explain why the equation below will not help you solve the problem.

There are _____________________________. Mrs. Tang put __________________________.


There were 13 clips added to the box. The equation will not help because 47 is the sum or the total of clips in the box.



Independent PracticeIndependent Practice


1) Tommy has 26 stamps in his album. His uncle gave him 28 more stamps. How many stamps does he have in his album now?

2) There are 32 boys and 27 girls in second grade. How many second-graders are there?

Strategy (Drawing)

Equation


Equation

There are ______________________.Tommy has ____________________________.



23


54 stamps in his album now 59 second-graders



Independent Practice (continued)

Independent Practice (continued)An equation uses an equal sign to say two amounts are the same. •An equation can be used to represent an addition word problem.

3) Hanna has 43 pictures in her cell phone. She took some more pictures today. Now there are 67 pictures. How many pictures did she take today?

4) Some pigs were in the mud. 19 more pigs jumped there. Then there were 53 pigs. How many pigs were in the mud before?


Equation


Equation

Hanna took ____________________. There were ____________________________.



23




Periodic Review 1Periodic Review 1


Solve addition word problems.

Equation

1) There are 37 girls and 25 boys in the cafeteria. How many kids are in the cafeteria altogether?

2) There were 33 books on the shelf. Mr. Lopez put some more books on there. Now there are 58 books. How many books did Mr. Lopez put on the shelf?

Will these equations help you solve the word problem above? Choose Yes or No for A – D.

45 straws are in a cup. Serene put some more straws in the cup. Then there were 76 straws. How many straws did Serene put in the cup?

A.

B.

C.

D.

O Yes O No

O Yes O No

O Yes O No

O Yes O No

Equation

There are _____________________________. Mr. Lopez put __________________________.






1) Melissa has 31 pieces of candy. She bought 17 more pieces of candy. How many pieces of candy does Melissa have now?

2) Jordan had some stamps in his album. He bought 29 more stamps. Now he has 52 stamps. How many stamps did he have in his album before?

Will these equations help you solve the word problem above? Choose Yes or No for A – D.

There were some cans on the shelf. Hanna put 19 more cans on the shelf. Now there are 37 cans. How many cans were on the shelf before?

A.

B.

C.

D.

O Yes O No

O Yes O No

O Yes O No

O Yes O No


Equation Equation

Melissa has ______________________. Jordan had ____________________________.







1) 62 students were in the cafeteria. Ms. Rocco’s students came there. Then there were 87 students. How many students are in Ms. Rocco’s class?

2) Some pigs were in the barn. 28 pigs came there. Then there were 63 pigs. How many pigs were in the barn before 28 more came?

Solve the above addition word problems using a strategy different from the one you used above.

Equation Equation

There are ___________________________. ________ were in the barn.


Back to Skill Development

Back to Independent Practice



EDI – Cognitive, Teaching, and English Learner Strategies

Learning Objective: We will solve addition word problems.

Elaboration

Targeted Vocabulary

Academic solve, represent, strategy

Content sum, addend, equation

Support

Demonstration

VocabularyStrategy

Multiple-Meaning

Synonym represent Definition solve, strategy, equation

Homophone

Internal Context Clue

Listen, Speak Similar Sounds

Write Writing

Read Tracked Reading

Comprehensible Input

Cognates

Contextual Clues

Graphic Organizer

Contextualized Definitions

Pictures

Language Strategies

Cognitive Strategies Teaching Strategies

Content Access Strategies

what are we going to learn? what does solve mean? solve means __________

Documents

addition problem

use addition

addition word problemdamon

solve1 addition word

twostep word problems

different addition strategies

grade operations

editrained teachers