Summary of 22/09/21 - 1ª Série EM - Matemática - Analisando gráficos e tabelas

00:00:00 - 00:25:00

In the YouTube video titled "22/09/21 - 1ª Série EM - Matemática - Analisando gráficos e tabelas," Professor Inês and her colleagues guide high school mathematics students through various activities to develop their skills in analyzing graphs and tables. Students learn to find percentages from circular graphs, identify continents with the most tourists to Brazil from a bar graph, and determine the number of students enrolled in different dance modalities from a table. The teachers encourage students to read questions carefully, add up numbers, and take their time to avoid confusion. The section ends with Professor Genilda addressing some complications in defining the maximum number of students in three dance modalities and encouraging viewers to learn more mathematics every day.

• 00:00:00 In this section of the YouTube video titled "22/09/21 - 1ª Série EM - Matemática - Analisando gráficos e tabelas," Professor Inês welcomes students to the 1ª série do Ensino Médio (High School) mathematics class where they will learn how to analyze graphs and tables. She encourages students to have paper, pencils, and calculators ready for the activities. Professor Roberta will also be present to help. The lesson is part of Volume Three, Sequence Three, and the objective is to develop the skill of analyzing graphs and tables. Students are shown an example of a circular graph divided into sectors with different colors representing various sports and their corresponding percentages. They are asked to find the percentage of people who practice a specific sport based on the graph and its legend. The professor emphasizes the importance of reading the question carefully to determine whether to look at the graph or the legend first.
• 00:05:00 In this section of the YouTube video titled "22/09/21 - 1ª Série EM - Matemática - Analisando gráficos e tabelas," the teacher explains how to identify the continents that Brazil receives the most tourists from by analyzing a bar graph. The graph shows the percentage of tourists arriving in Brazil from each continent in 2018. The teacher guides the students to look for the largest percentages in the graph and check the legend to identify the corresponding continents. The continents with the highest percentages are America do Sul (61.1,20%) and Europa (22.10%). The students are then asked to write their answers in the chat. The teacher encourages them to take their time and stay focused to avoid confusion. The section ends with the teacher moving on to another activity, a column graph, and wishing her students good luck.
• 00:10:00 In this section of the YouTube video titled "22/09/21 - 1ª Série EM - Matemática - Analisando gráficos e tabelas," the professor, Roberta, discusses the percentage of illiteracy (analfabetismo) in different regions of Brazil and their respective states. She analyzes a graph showing the percentage of illiteracy in each region, labeled as Brazil (BR), North (N), Northeast (NE), Southeast (S), and Central-West (CW). According to the graph, the Northeast region has the highest percentage of illiteracy at approximately 17.5%. The professor then moves on to answer questions related to the graph, such as which region has the highest illiteracy rate and what is the approximate illiteracy rate in the Southeast and South regions. She reminds the viewers that BR represents Brazil and encourages them to pay attention to the graph and answer the questions within a given time limit. The video ends with the professor praising the viewers for their participation and engagement.
• 00:15:00 In this section of the YouTube video titled "22/09/21 - 1ª Série EM - Matemática - Analisando gráficos e tabelas," Natália, who works at an academy, shares the number of students enrolled in each dance modality and turn - ballet, street dance, ballroom, sapateado, and jazz. She reads out the number of students for each turn and modality, and asks which turn has the most students enrolled. To answer the question, viewers must add up the numbers for each modality in the morning, afternoon, and night turns. The video then reveals the total number of students in each turn and encourages viewers to think about which modality has the most students in both turns combined. Viewers are given a minute and a half to come up with the answer.
• 00:20:00 In this section of the YouTube video titled "22/09/21 - 1ª Série EM - Matemática - Analisando gráficos e tabelas," Professor Inês starts by greeting her students and expressing her gratitude for their continued participation. She then asks them to find out which two dance modalities have the highest number of students enrolled. To do this, they need to analyze a table presented in the video, which lists the number of students enrolled in each dance modality and turn (morning, afternoon, and night). The students are given one and a half minutes to find the answer and are encouraged to watch the video again tomorrow afternoon to double-check their calculations. The professor then plays some music and ends the section.
• 00:25:00 In this section of the YouTube video "22/09/21 - 1ª Série EM - Matemática - Analisando gráficos e tabelas," Professor Genilda greets her audience and thanks those who have been sending in responses. She explains that defining the maximum number of students in three different dance modalities presented by Professor Roberta is complicated because they will appear at different periods. The professor then shares her own data, which includes 165 students in total, with 105 in dance de rua, 148 in dance de salão, and 153 in sapateado. She notes a difference of only five students between dance de salão and sapateado, which confuses the issue. She encourages viewers to do their homework and assures them that the objective is for them to learn more mathematics every day. She ends the video by wishing everyone good holidays and reminding them to vary in the classroom. She also provides a QR code and link for viewers to share their feedback.