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Step-by-step solution for Exercise 4 on Page 57 of Math 4 Textbook
Problem:
In a mountainous district, there are 8 lowland and 9 highland communes. Each lowland commune is issued 850 books, and each highland commune is issued 980 books. How many books were issued in the entire district?
Solution Approach:
- Given data:
+ 8 communes in lowland areas, each commune is provided with 850 books
+ 9 communes in highland areas, each commune is provided with 980 books
- Problem requirement: Calculate the total number of books allocated to the district
- Solution:
+ Calculate the number of books allocated to 8 communes in lowland areas by multiplying the number of books each commune is provided with by 8
+ Calculate the number of books allocated to 9 communes in highland areas by multiplying the number of books each commune is provided with by 9
+ Calculate the total number of books allocated to the district by adding the two results obtained above.
Answer:
The number of books allocated to 8 communes in lowland areas is:
850 x 8 = 6800 (books)
The number of books allocated to 9 communes in highland areas is:
980 x 9 = 8820 (books)
The number of books allocated to the district is:
6800 + 8820 = 15620 (books)
Answer: 15620 (books)
Section solving exercises on page 57 math 4, Multiplying by a single-digit number comprises 4 exercises. Following is the solution section of exercise 4 on page 57 Math 4 textbook. Mytour offers hints for answers and detailed solution methods for Solving Exercise 1 on Page 57 Math 4, Solving Exercise 2 on Page 57 Math 4, and Solving Exercise 3 on Page 57 Math 4. Students should grasp the knowledge of this lesson.
