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=> Refer to the complete Grade 4 math problem solutions here: Grade 4 math solutions
Guide to solving exercises on page 47 Math Grade 4 including solution methods
1. Exercise 1 Solution Page 47 Grade 4 Math Textbook
Problem:
Sum of father and son's ages is 58. Father is 38 years older than the son. How old are they?
Solution Method:
* Solving the problem knowing both sum and difference
- Method 1:
+ Step 1: Find the larger number by adding the sum with the difference, then divide by 2.
General formula: Larger number = (Sum + Difference) : 2
+ Step 2: Find the smaller number by subtracting the difference from the larger number / or subtracting the larger number from the sum.
General formula: Smaller number = Larger number - Difference or Smaller number = Sum - Larger number.
- Method 2:
+ Step 1: Find the smaller number by subtracting the difference from the sum, then divide by 2.
General formula: Smaller number = (Sum - Difference) : 2
+ Step 2: Find the larger number by adding the smaller number with the difference / or subtracting the smaller number from the sum.
General formula: Larger number = Smaller number + Difference or Larger number = Sum - Smaller number.
Answer:
Son's age is: (58 - 38) : 2 = 10 (years old)
Father's age is: 58 - 10 = 48 (years old)
Answer: Father 48 years old, son 10 years old.
2. Exercise 2 Solution Page 47 Grade 4 Math Textbook
Problem:
A classroom has 28 students. The number of male students is 4 more than the number of female students. How many male and female students are there in the class?
Solution Method:
>>> Refer to the detailed instructions on how to solve problems finding two numbers knowing their sum and difference in Exercise 1 on page 47 of Math textbook Grade 4.
Answer:
The number of male students is:
(28 + 4) : 2 = 16 (students)
The number of female students is:
16 - 4 = 12 (students)
Answer: 16 male students,
12 female students.
3. Solution to Exercise 3 Page 47 Math Textbook Grade 4
Problem:
Both class 4A and 4B planted 600 trees. Class 4A planted 50 fewer trees than class 4B. How many trees did each class plant?
Solution Method:
>>> Refer to the detailed instructions on how to solve problems finding two numbers knowing both sum and difference in Exercise 1 on page 47 of Math textbook Grade 4.
Answer:
The number of trees class 4A planted is:
550 : 2 = 275 trees
The number of trees class 4B planted is:
275 + 50 = 325 trees
Answer: Class 4A: 275 trees,
Class 4B: 325 trees
Guide to Solving Exercises on Page 47 Math Grade 4 Concise
Moreover, Solving Math 4 on page 54 is an important lesson in the Math 4 curriculum that students need to pay special attention to.
In addition to the content already learned, students can prepare and study the content of Exercise 4 on page 55 Practice to grasp the knowledge in the Math 4 curriculum.
Solving Math 4 exercises on page 46 Math textbook - Practice, Associative properties of addition have helped students understand the properties of addition. In the Math 4 problem-solving document with a system of solutions along with detailed instructions, you can completely apply them to your learning and homework process more quickly and accurately. Typically, solving problems Finding two numbers knowing their sum and difference will be presented more easily and effectively thanks to the Math 4 problem-solving document, which students can use to come up with the quickest and easiest methods to ensure meeting learning needs and improving knowledge levels.
In the next lesson, we will together explore various methods of solving Math 4 Exercises 1, 2, 3, 4 on page 47 Math textbook - Finding two numbers given their sum and difference. We invite you to refer for more details.
Here's the solution for Exercise 1 on page 47 of Math Grade 4 textbook in the exercise solving section for Grade 4 Math. Students can review previously solved exercises on page 46 of Math Grade 4 textbook or preview solutions for exercises on page 48 of Math Grade 4 textbook to enhance their understanding of Grade 4 Math.
