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

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

The first part: review knowledge and gradually lay the groundwork

1. Oral calculation.

3+6= 30+5= 9-7=

10-4= 5+4= 50+4=

9-3= 6-2=

2. Fill it out.

There are ( ) tens in 1.80, and ( ) tens is 50.

2. 9 tens are ( ), and there are ( ) tens in 40.

PPT on adding and subtracting integers to integers, part 2: situational presentation, revealing the topic

10＋20＝?

20-10=?

30-20=?

A two-digit number with a zero in the ones digit is called an integer.

Adding and subtracting integers to tens PPT, the third part: exploring new knowledge and intuitive modeling

Method 1: 10+20=

Method 2: 1 tens + 2 tens = 3 tens

Method three:

To calculate the addition and subtraction of whole tens, you need to think of how many tens to add or subtract. The calculation method is basically the same as the addition and subtraction within 10. You can first think of "how many to add and how many to subtract", and then Add 0 after the number.

Adding and subtracting integers to tens PPT, part 4: Consolidate application and deepen understanding

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

40＋20＝

60-20＝

60-40＝

1+3+4=

9-4-3=

10+30+40=

90-40-30=

Adding and subtracting integers to tens PPT, Part 5: Class summary

What did you gain from studying this class?

Keywords: Free download of PPT courseware for mathematics in the second volume of the first grade of the People's Education Press, download of addition and subtraction of whole tens PPT, download of addition and subtraction within 100 PPT, .PPT format;

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" 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+..

"Adding and subtracting whole tens to whole tens" PPT courseware for addition and subtraction within 100:

"Adding and subtracting whole tens" PPT courseware for addition and subtraction within 100. I will fill in 1. 65 is composed of ( ) tens and ( ) ones. 2. 29 is composed of ( ) ones and ( ) tens. 3. The ones digit is 7 and the tens digit is 4. This number is ( )..

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Update Time: 2024-11-25

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

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