"Adding and Subtracting Integer Tens" PPT courseware for addition and subtraction within 100

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"Adding and Subtracting Integer Tens" PPT courseware for addition and subtraction within 100

1. Review old knowledge

Do the math.

2+3＝6-2＝

5＋4＝7－4＝

3+4＝ 9-4＝

2. Explore new knowledge

(1) Introduction of situations and raising questions

What are the teachers and students in the picture doing?

There are 30 books in total. There are 20 books on the right. How many books are on the left?

What other questions could be asked?

(2) Adding whole tens to whole tens

This is how I think about it: 1 tens plus 2 tens gets 3 tens, which is 30.

I can also use a counter to help.

3. Application of knowledge

(1) Look at the diagram

Looking at the picture, you can list addition equations or subtraction equations.

(2) Do the math

I discovered that to add or subtract whole tens, just add and subtract the numbers in the tens place.

(3) Solving problems

1. How much does it cost to buy the three items above?

2. If you pay a salesperson 100 yuan, how much money should you get back?

4. Assign homework

Homework: Exercise 14 on page 63, questions 1 to 5.

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For more information about the PPT courseware "Addition and subtraction of whole tens within 100, addition and subtraction of whole tens", please click the Addition and subtraction of whole tens within 100 PPT, addition and subtraction of whole tens PPT tag.

"Adding and Subtracting Integer Tens" PPT on addition and subtraction within 100:

"Adding and Subtracting Whole Tens to Whole Tens" PPT on addition and subtraction within 100. The first part of the content: review knowledge and gradually pave the way 1. Oral arithmetic. 3+6= 30+5= 9-7= 10-4= 5+4= 50+4= 9-3= 6-2= 2. Fill in the blanks. 1. There are ( ) tens in 80, ( ) tens...

"Adding and Subtracting Integer Tens" Addition and subtraction within 100 PPT courseware 3:

"Adding and subtracting whole tens" Addition and subtraction within 100 PPT courseware 3 Teaching objectives 1. Connect with the actual life to initially understand and master the oral calculation method of adding and subtracting whole tens, and be able to choose your favorite method Perform oral calculations. 2. Explore different...

"Adding and Subtracting Integer Tens" Addition and subtraction within 100 PPT courseware 2:

"Adding and subtracting whole tens" PPT courseware for addition and subtraction within 100 2 I can count, what about you? 3+2= 2+7= 6-3 = 9-4= 5+1= 7-2= 5+3= 8-5= 7-4= 2+5= 8-2= 5+4= .. . ... ... 2. Oral calculation. 3+2＝ 4+5＝ 6－4＝ 30+..

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Update Time: 2024-06-29

This template belongs to Mathematics courseware People's Education Press First Grade Mathematics Volume 2 industry PPT template

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