"Lianjia" PPT courseware for addition within 20 Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
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Authoritative PPT Summary
"Lianjia" PPT courseware for addition within 20
teaching objectives
1. Combined with the problem situation, experience the process of trying to calculate the addition of three numbers and understand the continuous addition formula.
2. Be able to calculate the addition of three numbers using different methods, and be able to perform continuous addition calculations.
3. Understand that different methods can be used to solve problems and gain a successful experience in mathematics learning.
review review
9+5= 9+3= 8+5=
7+6= 9+4= 8+4=
6+9= 9+2= 7+5=
In conclusion
1. The continuous addition of 3 or more numbers is called continuous addition.
2. When calculating the continuous addition formula, calculate in order from left to right. First add the first two numbers, and then add the added number to the third number.
Classroom Application
How many chicks are there in total?
3＋2＋1＝6
practice
1. Let’s see who can count faster.
7+4+6 = 8+7+2 = 7+3+8＝
6+9+4 = 6+8+3 = 4+6+5＝
5＋6＋5 = 2+6+9 = 5＋5＋7＝
2. Send a letter.
3. Ask questions and answer them.
Knowledge and memory
Calculate consecutive addition problems in order from left to right.
You need to count the previous steps and use them for the next steps, and check the correct questions repeatedly.
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