Solving exercises on page 82 of Math 3 Book 1, Connecting Knowledge with Life series

Solving Math problems for Grade 3 on page 82, Connecting Knowledge with Life Book 1

Solving exercises on page 82 of Math 3 Book 1, Connecting Knowledge with Life series:

Two-Step Calculation Problem

Activity

1. Solve Exercise 1 on Page 82 SGK Math Grade 3

Problem: Number?

The first container holds 5 liters of fish sauce, and the second container holds an amount of fish sauce three times that of the first container. How much fish sauce do both containers hold together?

Solution Guide:
The number of liters of fish sauce in the second container = The number of liters of fish sauce in the first container multiplied by 3.
The total liters of fish sauce in both containers = The number of liters of fish sauce in the first container + The number of liters of fish sauce in the second container.

Answer:

2. Solve Exercise 2 on Page 82 SGK Math Grade 3

Mai folds 10 boats, and Nam folds 3 fewer boats than Mai. How many boats can both of them fold?

Solution Guide:
Step 1: The number of boats Nam can fold = The number of boats Mai can fold - 3.
Step 2: The total number of boats both of them can fold = The number of boats Mai can fold + The number of boats Nam can fold.

Answer:

Summary:

Solution:
Nam folds 7 boats.
Both of them fold 17 boats.
Answer: 17 boats.

Practice

1. Solve Exercise 1 on Page 82 SGK Math Grade 3

Problem: In the morning, the store sold 10 computers. In the afternoon, the store sold 4 fewer computers than in the morning. How many computers did the store sell in both sessions?

Solution:
Step 1: The number of computers the store sold in the afternoon = The number of computers the store sold in the morning - 4.
Step 2: The total number of computers the store sold in both sessions = The number of computers sold in the morning + The number of computers sold in the afternoon.

Answer:

Summary:
In the afternoon, the store sold a number of computers:
                      10 - 4 = 6 (computers)
In both sessions, the store sold a number of computers:
                       10 + 6 = 16 (computers)
                               Answer: 16 computers.

Bài giải
Buổi chiều cửa hàng bán được số máy tính là:
                      10 - 4 = 6 (máy tính)
Cả hai buổi cửa hàng bán được số máy tính là:
                       10 + 6 = 16 (máy tính)
                                       Đáp số: 16 máy tính.

2. Solve Exercise 2 on Page 82 of Math Grade 3 Textbook

Problem: The zigzag path ABC has AB = 9 cm, and segment BC is twice the length of segment AB. How long is the zigzag path ABC in centimeters?

Solution:
- Length of segment BC = Length of segment AB x 2
- Length of zigzag path ABC = Length of segment AB + Length of segment BC

Detailed Solution:

Summary

Solution
The length of the straight segment BC is
             9 x 2 = 18 (cm).
The length of the zigzag path ABC is:
             9 + 18 = 27 (cm)
                         Answer: 27 cm.

3. Solve Exercise 3 on Page 82 of Math Grade 3 Textbook

Problem: State the problem in a concise manner and then solve it.

Solution Guide:
- Observe the diagram and formulate a suitable problem.
- Solution approach:
The kilograms of rice bags = The kilograms of corn bags + 10 kg.
The total kilograms in both bags = The kilograms of rice bags + The kilograms of corn bags.

Answer:

You can state the problem as follows:
The corn bag weighs 30 kg, and the rice bag is 10 kg heavier than the corn bag. How much do both bags weigh together?

Solution
The rice bag weighs in kilograms:
                  30 + 10 = 40 (kg)
Both bags together weigh in kilograms:
                  30 + 40 = 70 (kg)
                                   Answer: 70 kg.

We hope that with the solution to exercise 82 in Math Grade 3 Volume 1, the Connect Knowledge with Life book, you've learned how to solve problems in the Two-Step Calculation lesson. You can refer to more exercises to strengthen your knowledge.