Solving Exercises on Pages 24 and 25 SGK Math 5, Practice Session

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Guidelines for solving exercises on pages 24,25 Math 5 including solving methods

1. Solve Exercise 1 on pages 24, 25 SGK Math 5

Problem:
The Hoa Binh school team collected 1 ton 300kg of shredded paper. The Hoang Dieu school team collected 2 tons 700kg of shredded paper. Knowing that for every 2 tons of shredded paper, 50,000 student notebooks can be produced. How many student notebooks can be produced from the total shredded paper collected by both schools?

Solving method:

- Step 1: Find the total tons of shredded paper collected by both schools by: Adding the shredded paper of Hoa Binh school to the shredded paper of Hoang Dieu school

- Step 2: Find the number of notebooks produced per ton of shredded paper by: Dividing the number of notebooks produced by 2 tons of shredded paper by 2.

- Step 3: Find the number of notebooks that can be produced from the shredded paper collected by both schools by: Multiplying the number of notebooks produced per ton of shredded paper by the total tons of shredded paper collected by both schools.

Answer:
Both schools collected the total shredded paper of:
      1 ton 300kg + 2 tons 700kg = 3 tons 1000kg = 4 tons
Each ton of shredded paper produces:
      50,000 : 2 = 25,000 (notebooks)
4 tons of shredded paper produce:
      25,000 x 4 = 100,000 (notebooks)
Answer: 100,000 notebooks.

2. Solve Exercise 2 on pages 24, 25 SGK Math 5

Problem:
A worm weighs 60g. An ostrich weighs 120kg. How many times heavier is the ostrich than the worm?

Solving method:

- Convert the weight units from kilograms to grams

- To find out how many times heavier the ostrich is than the worm, we simply need to divide the weight of the ostrich by the weight of the worm.

Answer:
Unit conversion: 120kg = 120,000g
The ostrich is how many times heavier than the worm:
      120,000 : 60 = 2000 (times)
                            Answer: 2000 times.

3. Solve question 3 on pages 24, 25 Math 5 textbook

Solving method:

- Step 1: Calculate the area of the rectangle using the formula: S = a x b (where: S is the area; a is the length; b is the width)

- Step 2: Calculate the area of the square using the formula: S = a x a (where: S is the area; a is the side)

- Step 3: Calculate the total area of the two shapes by adding the area of the rectangle to the area of the square.

Answer:
The area of the rectangle is:
      14 x 6 = 84 (cm²)
The area of the square is:
      7 x 7 = 49 (cm²)
The total area of the shape is:
       84 + 49 = 133 (cm²)
                    Answer: 133cm².

4. Solve question 4 on pages 24, 25 SGK Math 5

Solving method:

- Find the area of rectangle ABCD (corresponding to the number of squares) by multiplying the length by the width

- Analyze the number of squares into the product of two numbers different from the two given numbers (length, width) initially

- From there, create rectangle MNPQ with the same area but different dimensions from ABCD.

The answer is: Rectangle ABCD consists of: 4 x 3 = 12 (squares). Write 12 as the product of two numbers (other than 4 and 3).

Guidelines for solving exercises on pages 24 and 25 of Math 5 concisely.

Exercise 1 page 24 Math 5 – Practice:
The two schools collected a total of:
1 ton 300kg + 2 tons 700kg = 3 tons 1000kg = 4 tons.
Each ton of scrap paper produces:
50,000 : 2 = 25,000 (notebooks).
4 tons of scrap paper produce:
25,000 × 4 = 100,000 (notebooks).
Answer: 100,000 notebooks.
Exercise 2 page 24 Math 5 – Practice:
A sparrow weighs 60g. An ostrich weighs 120kg. How many times heavier is the ostrich than the sparrow?
Solution:
Convert units: 120kg = 120,000g.
The ostrich is 2000 times heavier than the sparrow.
Answer: 2000 times.

Explore the topic of Multiplying a decimal by a decimal to enhance understanding and improve problem-solving skills in Math.

Here are hints for solving exercises on pages 24 and 25 of Math 5. Prepare for the topics of Square Decimeter and Hectometer Square via the solutions on pages 26 and 27 of Math 5 and the Millimeter Square topic. Understand area measurement units through solving exercises on page 28 of Math 5 for better understanding of Math 5.

In addition to the above, you can explore the solutions to Math 5 exercises on page 73 to prepare for solving exercises on page 73 of Math 5, focusing on practice.

Furthermore, solving exercises on page 70 of Math 5 is an important lesson, so you should prepare for solving exercises on page 70 of Math 5 at home.