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Mathematics Review of expanded form and regrouping Created by: Tamara V. Russell.

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Presentation on theme: "Mathematics Review of expanded form and regrouping Created by: Tamara V. Russell."— Presentation transcript:

1 mathematics Review of expanded form and regrouping Created by: Tamara V. Russell

2 Lesson Objective Today we will see if you remember how to use expanded form as a strategy for addition.

3 Essential question How do you break apart addends to add thousands, hundreds, tens and then ones?

4 vocabulary value – this is what a digit is worth based on its place within a number. expanded form – a way to write a number that shows the values of each digit of a number.

5 review What is the value of the underlined digit? 33

6 review What is the value of the underlined digit?

7 review What is the value of the underlined digit?

8 review What is the value of the underlined digit? 19,98510,000

9 Expanded form Now lets review writing numbers in expanded form. Here is an example… 395 =

10 review How do you write 281 in expanded form? 281 =

11 review How do you write 3,561 in expanded form? 3,561 = 3,

12 review How do you write 8,309 in expanded form? 8,309 = 8,

13 review How do you write 45,897 in expanded form? 45,897 = 40, ,

14 Lesson You can use expanded form as a strategy to add numbers. For example… 375 = = =

15 Practice Can you complete the following problem? 412= = _____________________ _____ =

16 Practice Can you complete the following problem? 223= = _____________________ _____ =

17 Practice Can you complete the following problem? 560= = _____________________ _____ =

18 practice Time for think, pair, share. First, complete lesson 7.1 on paper. Then work with a partner to share & check your work.

19 regrouping Sometimes you will need to regroup in order to add. You can still use the expanded form strategy. For example… 235 = = = Take away a ten and then add ten to the tens column Ten plus 60 is? 70 10

20 regrouping Lets try that again…. 235 = = = Take away a ten and add ten to the tens column Ten plus 70 is? The answer is….

21 regrouping One more time… 425 = = = Take away a ten and add ten to the tens column Ten plus 110 is? The answer is…. Take away a hundred and add a hundred to the hundreds column

22 White board practice Use your whiteboards and markers for the next three problems.

23 practice Using the expanded form method, solve the following problem =

24 practice Using the expanded form method, solve the following problem =

25 practice Using the expanded form method, solve the following problem. 1, =

26 Great Job! Exit ticket: How do you break apart addends to add thousands, hundreds, tens and then ones? Respond on your white board.


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