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"Doubled Understanding" PPT teaching courseware
Part One: Learning Objectives
1. Understand the relationship between quantities in the problem of finding how many times one number is another number, and be able to answer such questions correctly.
2. Learn to use visual graph analysis to find the quantitative relationship of how many times one number is another number, and find ways to solve the problem.
[Heavy and difficult points] Find the quantitative relationship of how many times one number is another number, and find a way to solve the problem.
Double understanding of PPT, part 2: reading and understanding
I know how many students are cleaning tables and chairs and how many students are sweeping the floor.
The question is how many times more people are cleaning tables and chairs than sweeping floors?
Analysis and Answers
I drew a schematic diagram, and it can be clearly seen that there are three times as many people cleaning tables and chairs as there are sweeping floors.
The number of people requesting to clean tables and chairs is several times that of sweeping floors. To find out how many 4s there are in 12, use division method to calculate.
12÷4＝3
Double understanding of PPT, the third part: classroom exercises
1. Can you come up with a problem that can be solved by division?
How many times the price of a desk lamp is that of a desk calendar?
49÷7＝7
The desk calendar is 7 yuan, and 7 times 7 is 49, which is exactly the price of the desk lamp. The answer is correct.
2. Solve the problem
How many times more do shoes cost than hats?
32÷8=4
Answer: The price of shoes is four times that of hats.
3. Yucai Primary School Music Group has 24 chorus members, 8 musical instruments players, and 4 dancers.
(1) How many times are the number of people singing chorus as there are playing instruments?
24÷8=3
Answer: The number of people singing chorus is three times that of playing instruments.
(2) How many times more people play musical instruments than dance?
8÷4=2
Answer: There are twice as many people playing musical instruments as dancing.
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"Doubled Understanding" PPT download:
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"Doubled Understanding" PPT:
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"Understanding of times" PPT courseware on multiplication and division in tables:
"Understanding of times" PPT courseware on multiplication and division in tables Teaching objectives 1. Combined with specific situations, experience the process of understanding the concept of times. 2. Have a preliminary understanding of the meaning of multiples, and be able to answer simple questions about multiples based on intuitive things. 3. Encourage students to...