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Guidance for solving Exercise 2 on Page 21 of Math 5 Workbook
Problem statement:
A family comprises 3 individuals (father, mother, and one child). The average monthly income is 800,000 VND per person. If the family adds another child without changing the total income, how much does the average monthly income per person decrease?
Solution method:
- Step 1: Find the total income of the family by multiplying the average monthly income per person by 3 (people)
- Step 2: To find the average income per person with an additional child, divide the total family income by 4 (people)
- Step 3: Determine the amount by which the average monthly income per person decreases when adding another child by subtracting the total income from the average income per person when adding one child (result obtained in Step 2).
Answer:
The monthly income of that family is:
800,000 x 3 = 2,400,000 (dong)
If there is an additional child, the average income per person will be:
2,400,000 : (3 + 1) = 600,000 (dong)
The decrease in the average income per person is:
800,000 - 600,000 = 200,000 (dong)
Mytour has recently provided a guide for solving exercise 2 on page 21 of Math 5 textbook. Additionally, we recommend solving exercises Exercise 1 on page 21 of Math 5 workbook practice, Exercise 3 on page 21 of Math 5 workbook practice, and Exercise 4 on page 21 of Math 5 workbook practice along with their methods. Explore the guide for solving exercises on page 21 Math 5 to excel in 5th-grade math.
