Answers to exercises 5.14, 5.15, 5.16, 5.17 of the Concentrated Practice lesson in textbook page 107 are all included in Solving Grade 7 Math Problems from Page 107, Exercise Book 1, Linking Knowledge with Life. Through this material, students can easily solve exercises as well as grasp the chapter's knowledge.
Referring Various Grade 7 Math Resources
- Solving Grade 7 Math Problems from Page 107, Exercise Book 1, Linking Knowledge with Life
- Solving Grade 7 Math Problems from Page 109, 110, Exercise Book 1, Sky Horizon Creative - End of Chapter 5 Exercises
- Solving Grade 7 Math Problems from Page 34, 35, 36, Exercise Book 2, Kite - End of Chapter 5 Exercises
Solving Grade 7 Math Problems from Page 107, Exercise Book 1, Linking Knowledge with Life
Concentrated Practice
1. Solve Exercise 5.14 Page 107 Math Grade 7 Textbook
Problem: Determine the method of data collection in each of the following cases and specify the type of data collected in each case?
a) Frequency of morning exercise of classmates in the class (very frequent, frequent, not frequent).
b) Means of transportation used by classmates to go to school.
Solution Guide:
Commonly seen data collection methods: questionnaire, interview, experiment, obtaining data from books, newspapers, internet,...
Data includes:
+ Data
+ Non-numeric data: includes types that can be ordered and types that cannot be ordered
Answer:
a) Data collection method: questionnaire.
Non-numeric data, can be ordered.
b) Data collection method: questionnaire or interview.
Non-numeric data, cannot be ordered.
2. Solve Exercise 5.15 Page 107 Math Grade 7 Textbook
Problem: Are the data collected in each of the following cases representative?
a) To determine the jumping ability of 7th grade students, the teacher asked club basketball members to jump and recorded the results.
b) To survey students' opinions on new regulations, the school randomly selected some 7th grade students and distributed survey forms.
Solution Guide:
Data collected randomly from the surveyed object ensures representativeness.
Answer:
a) Not representative because the jumping ability of basketball club students does not represent the jumping ability of all 7th grade students.
b) Representative because the surveyed students were randomly selected.
3. Solve Exercise 5.16 Page 107 Math Grade 7 Textbook
Problem: Chart Figure 5.36 is extracted from a province's report on the physical condition of secondary school students in this province.
A secondary school in the province has 1500 students. Estimate the proportion of obese students in that school.
Solution Guide:
- Analyze the chart to determine the proportion of obese students.
- To find a% of b, multiply a by b and then divide by 100.
Answer:
The number of obese students accounts for 15% of the total number of students.
There are approximately 225 obese students in that secondary school.
4. Solve Exercise 5.17 Page 107 Math Grade 7 Textbook
Draw a line graph as requested by the problem.
Answer:
Here's a guide to solving Grade 7 math problems on page 107, Exercise Book 1. Students should also refer to Grade 7 math problems on page 108, Exercise Book 1, and review Grade 7 math problems on page 105, Exercise Book 1 to ensure understanding.
- Solve Grade 7 math problems on page 108, 109, Exercise Book 1, Linking Knowledge with Life - End of Chapter 5 Exercises
- Solve Grade 7 math problems on page 105, Exercise Book 1, Linking Knowledge with Life - Exercise 19: Line Graph
Buzz
