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Solving 4th-grade math problems on pages 106 and 107 of VBT workbook volume 2, Reviewing how to find the average number, exercise 169 is a resource designed for students to guide and provide detailed solutions for exercises 1, 2, 3, 4. Students are encouraged to review to understand the problem-solving techniques along with the lesson content.
Solving 4th-grade math problems on pages 106 and 107 of VBT workbook volume 2, Reviewing how to find the average number, exercise 169
1. Solving exercise 1 - Workbook for 4th-grade math exercise book 2 page 106
Problem Statement:
Find the average of the following numbers:
a) 1038; 4957; and 2495
b) 3806; 7542; 1093; and 4215
Solution Method
To find the average of multiple numbers, we sum up all the numbers and then divide the sum by the total number of terms.
Answer
a) The average of numbers 1038, 4957, and 2495 is:
2830
b) The average of numbers 3806, 7542, 1093, and 4215 is:
4164
2. Solve problem 2 - Math workbook Grade 4 Exercise 2 page 107
The average number of newspapers each class buys is:
Khối lớp Ba mua số tờ báo là:
Khối lớp Nam mua số tờ báo là:
- The number of newspapers the Third-grade class buys = the number of newspapers the Fourth-grade class buys −78 newspapers.
Number of newspapers the Fifth-grade class buys =
Average number of newspapers each class has bought =
Answer
Khối lớp Ba has bought newspapers:
174 - 78 = 96 (sheets)
The Fifth-grade class has bought number of newspapers:
174 + 93 = 267 (sheets)
Average number of newspapers each class buys is:
(174 + 96 + 267) : 3 = 179 (sheets)
Answer: 179 sheets of newspaper.
3. Solve problem 3 - Math workbook Grade 4 Exercise 2 page 107
Problem statement:
Fill in the blank with the average score:
Solution method
To calculate the average score of each student, we divide the total score of each student by the total number of assignments.
Answer
An has the number of tests:
3 + 5 + 1 + 11 = 20 (tests)
The total score achieved by An is:
7 x 3 + 8 x 5 + 9 x 1 + 10 x 11 = 180 (points)
The average score of An is:
180 : 20 = 9 (points)
Binh has the number of tests:
12 + 5 + 2 + 1 = 20 (tests)
Here is the result table:
4. Solving Exercise 4 - Math workbook for 4th grade page 107
Problem statement:
A group of workers received 480,000 dong for the first time and 540,000 dong for the second time. What is the average amount each person received, if:
a) Does the group consist of 3 people?
b) Does the group consist of 4 people?
Solution method
To find the average amount each person receives, we divide the total amount by the number of people in the group.
Answer
a) The average amount each person receives is:
(480,000 + 540,000) divided by 3 equals 340,000 (dong)
b) The average amount each person receives is:
(480,000 + 540,000) divided by 4 equals 255,000 (dong)
Answer: a) 340,000 dong; b) 255,000 dong.
You are viewing the instructions for Solving Math Problems for 4th Grade, pages 106 and 107, Workbook Volume 2, Reviewing Finding the Average, Exercise 169. You can review the instructions for Solving Math Problems for 4th Grade, pages 105 and 106, Workbook Volume 2, Reviewing Geometry (continued) or preview the instructions for Solving Math Problems for 4th Grade, pages 108 and 109, Workbook Volume 2, to prepare for the next lesson most effectively.
