"Library" Addition and Subtraction PPT Teaching Courseware

Description

"Library" Addition and Subtraction PPT Teaching Courseware

Part One: Learning Objectives

1. Explore and master the calculation method of adding two digits to one digit with carry, and initially experience the diversification of calculation methods.

2. Feel the close connection between number calculation and life, and further appreciate the significance of addition.

3. Learn to calculate carry and addition in vertical expressions, and know the operation rules of "full ten to one".

4. Develop comprehensive learning abilities through independent exploration and communication.

[Key Points] Master the arithmetic and methods of carry addition.

【Difficulty】Suggest different calculation methods based on small stick operations.

Library PPT, Part 2: Introduction of new knowledge

Students, you can encounter mathematics-related problems everywhere in your life. Today, we went to the library to buy extracurricular books and see what math problems we would encounter there.

To find "total", use addition.

28+4=

You can swing it with a stick.

8＋4＝12 20＋12＝32

Library PPT, Part 3: Classroom Exercises

1. Go around in a circle and do the math.

35＋5＝40 40＋3＝43

4+7＝11 20+11＝31

2. Do the math in vertical form.

58＋7＝ 32＋9＝

38＋6＝ 8＋27＝

3. Forest doctor.

Library PPT, Part 4: Class Summary

When performing carry addition of two digits plus one digit, pay attention to the following: align the same digits, add from the ones digit, and carry "one" to the "tens" digit when the ones digit reaches ten; pay attention when adding tens digits , don’t forget the “1” that comes in as the ones digit.

Library PPT, Part 5: Classwork

1. How many stars can you get?

27 + 7=

26 + 5 = 28 + 8 =

9 + 12 =

9 + 27 = 9 + 32=

9 + 36 =

35 +7 = 3 + 59 =

2. Do the math.

68 + 7 = 39 +6 =

5 + 39 = 56 + 5 =

5 + 38 = 5 + 28 =

19 + 7 = 87 +6 =

3. Grandpa has 60 yuan. He bought a pair of glasses and a cup. How many yuan did he spend?

38 + 8 =

Answer: It cost 46 yuan.

4. Mom bought a desk and a pencil case. How much did it cost?

87 + 9=

Answer: It cost 96 yuan.

Keywords: Free download of Beijing Normal University Edition first-year mathematics PPT courseware for volume 2, library PPT download, addition and subtraction PPT download, .PPT format;

For more information about the "Adding and Subtracting Library" PPT courseware, please click the Adding and Subtracting PPT Library PPT tab.

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Update Time: 2024-09-30

This template belongs to Mathematics courseware Beijing Normal University Edition First Grade Mathematics Volume 2 industry PPT template

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