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英语学习资料:Ch.4 Additional Subtraction Word Problems  

2015-10-11 10:43:39|  分类: IC1.1 英语学习资 |  标签: |举报 |字号 订阅

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Sample:

Tina had 10 pieces of chalk.  She gives some to her friends.  She has 5 pieces of chalk left.  How many pieces of chalk did Tina give away?         

______________pieces of chalk

Method #1

 

Step 1: Circle the question.

英语学习资料:Ch.4 Additional Subtraction Word Problems - teacher - 英特一(1)博客

 



Step 2: Draw the problem.


 

A- Draw 10 circles for the 10 pieces of chalk Tina had.

英语学习资料:Ch.4 Additional Subtraction Word Problems - teacher - 英特一(1)博客

 



B - Circle the circles for the pieces of chalk Tina has left. 

英语学习资料:Ch.4 Additional Subtraction Word Problems - teacher - 英特一(1)博客

 


 

 

C- Cross out the rest of the circles.  These represent the pieces of chalk Tina gave away.

英语学习资料:Ch.4 Additional Subtraction Word Problems - teacher - 英特一(1)博客

 


D- The number of crossed out circles represent the pieces of chalk Tina gave away.  There are 5 crossed out circles, so Tina gave away 5 pieces of chalk. 


Method #2 

Use a subtraction sentence to solve the problem.  

10 - _______ = 5

The number we start with is 10 because Tina had 10 pieces of chalk. 

Tina gave some away.  We do not know the number so we will leave the second section black.

The difference is 5 because Tina has 5 pieces of chalk left.

Using reasoning, find the answer. 

 

Method #3

Use addition to solve the problem.  In class we practiced using Methods #1 and #2 so your child may be more familiar with these methods.

5 + _____ = 10

Tina has 5 pieces of chalk left.  She started with 10 pieces of chalk. 

What number do I add to 5 to make 10?

The answer is 5 pieces of chalk.

__________________________________________________________________________________________________________________________________________________________________________________________________________


 

* Please read the questions aloud to your child.

  


 

1. Thomas had 7 erasers.  He gives some to his friends.  He has 3 erasers left.  How many erasers did he give away?

______________erasers


2. Victor had 3 pencils.  He gives some away. He has 1 pencil left.  How many pencils did Victor give away?

______________pencils

 

3. Mr. James had 10 stickers. He gave some away. He has 0 left. How many stickers did Mr. James give away?

______________stickers

 

4. Molly had 5 pencils.  She gives some to her friends.  She has 4 pencils left.  How many pencils did Molly give away?

______________pencils

 

5. Pam had 8 sharpeners.  She gives some away.  She has 1 sharpener left.  How many sharpeners did Pam give away?         

______________sharpeners

 

6. Mark had 5 erasers.  He gives some away.  He has 2 erasers left.  How many erasers did he give away?

______________erasers

 

7. Victor had 3 pencils.  He gives some away. He has 1 pencil left.  How many pencils did Victor give away?

______________pencils

 

8. Miss Jenna had 12 color pencils. She gave some away.  She has 3 left. How many color pencils did Miss Jenna give away?

______________color pencils

 

9. Steven had 9 rulers.  He gives some away.  He has 2 rulers left.  How many rulers did Steven give away?

______________rulers


 

Answers:

 

  1. 4 erasers
  2. 2 pencils
  3. 10 stickers
  4. 1 pencil
  5. 7 sharpeners
  6. 3 erasers
  7. 2 pencils
  8. 9 color pencils
  9.  7 rulers
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