"Ten minus 5, 4, 3, 2" PPT teaching courseware for subtraction within 20

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"Ten minus 5, 4, 3, 2" PPT teaching courseware for subtraction within 20

Part One: Learning Objectives

1. Learn to subtract 5, 4, 3, and 2 from a dozen, and be able to solve simple practical problems.

2. Further perceive the connection between addition and subtraction, and promote the improvement of calculation ability.

3. Cultivate students’ awareness of independent exploration, cooperation and communication.

Learning points

Learn how to calculate ten minus 5, 4, 3, and 2.

Learning difficulties

Flexibly use the calculation method of subtracting numbers from tens to make calculations.

More than ten minus 5432PPT, part 2: review introduction

Do the math.

12-5= 11-4=

12-4= 11-3=

12-3= 11-2=

What methods have you thought of?

I thought of 3 ways.

Want to add and subtract

Breaking the Ten Laws

continuous subtraction

In this lesson we will continue to use these calculation methods to solve problems.

More than ten minus 5432PPT, the third part: independent exploration

Do the math.

12-5= 11-4=

12-4= 11-3=

12-3= 11-2=

Which method are you going to use? Please choose a question and write down the solution process.

Want to add and subtract

12-5=

Think about it, how many sums of 5 add up to 12?

5+7=12, so the box should be filled with 7.

Breaking the Ten Laws

12-5=

12 is the sum of 10 and 2. Use the breaking ten method to express it as shown on the right:

continuous subtraction

12-5=

It can be divided into 3+2 and calculated using continuous subtraction: 12-2-3=7.

More than ten minus 5432PPT, Part 4: Compliance Testing

1. Oral calculation.

14-8= 12-7=

13-9= 15-6=

12-6= 17-9=

14-7= 15-8=

2. The maximum number of words that can be filled in the brackets.

13-( )＞5 7+( )＜15

15-( )>7

3. What is the smallest number that can be filled in the brackets?

13-( )＜5 6+( )＞12

7+( )＞11

More than ten minus 5432 PPT, part five: Consolidate and improve

1. Do the math.

11-3= 12-6= 13-7=

12-8= 11-2= 14-5=

13-4= 12-9= 19-8=

Ten minus 5432PPT, Part Six: Class Summary

Ten minus 5, 4, 3, 2

Want to add and subtract

Breaking the Ten Laws

continuous subtraction

Ten minus 5432 PPT, Part 7: Homework

1. Select from the after-class exercises;

2. Complete the exercises in this lesson in the exercise book.

Keywords: Free download of PPT courseware for mathematics in the second volume of the first grade of the People's Education Press, download of subtraction within 20 PPT, download of ten plus 5432 PPT, .PPT format;

For more information about the PPT courseware "Abdication Subtraction Within 20, Subtraction from Ten Tens 5432", please click on the Subtraction PPT Within Tens 5432 PPT tag of Abdication Subtraction within 20.

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Update Time: 2024-09-26

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

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