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Guidelines for solving exercises on page 27 of Math textbook for 4th graders include solving methods
1. Solving Exercise 1 Page 27 Math Textbook Grade 5
Exercise:
Find the average of the following numbers:
a) 42 and 52 b) 36; 42 and 57.
c) 34; 43; 52 and 39 d) 20; 35; 37; 65 and 73
Solution Method:
How to calculate the average of multiple numbers:
- Step 1: Find the sum of the numbers by adding all the numbers together (do mental arithmetic for simple numbers or use a handheld calculator for large, complex numbers)
- Step 2: Count the number of terms by counting how many numbers are in the given set. If there are repeating numbers, they must be counted as well
- Step 3: Find the average by dividing the sum (result from step 1) by the number of terms (result from step 2).
Answer:
a) 42 and 52
The sum of two numbers is: 42 + 52 = 94
The average of two numbers is: 94 : 2 = 47.
b) 36; 42 and 57.
The sum of three numbers is: 36 + 42 + 57 = 135
The average of three numbers is: 135 : 3 = 45
c) 34; 43; 52 and 39
The sum of four numbers is: 34 + 43 + 52 + 39 = 168
The average of four numbers is: 168 : 4 = 42
d) 20; 35; 37; 65 and 73
The sum of five numbers is: 20 + 35 + 37 + 65 + 73 = 230
The average of five numbers is: 230 : 5 = 46
2. Solving Exercise 2 Page 27 Math Textbook Grade 5
Exercise:
Four students Mai, Hoa, Hung, Thinh weigh 36 kg, 38 kg, 40 kg, 34 kg respectively. What is the average weight of each student in kilograms?
Solution Method:
* Observation:
- The problem states: The weights of four students Mai, Hoa, Hung, Thinh are 36; 38; 40; 34 respectively.
- The problem requires: Finding the average weight of each student.
* Solution:
- Find the total weight of the 4 students
- Calculate the average weight by dividing the total weight of the 4 students by 4.
Answer:
The total weight of the four students is:
36 + 38 + 40 + 34 = 148 kg.
The average weight of the four students is:
148 : 4 = 37 kg.
Answer: 37 kg.
3. Solving Exercise 3 Page 27 Math Textbook Grade 5
Exercise:
Find the average of consecutive natural numbers from 1 to 9.
Solution Method:
- Step 1: List consecutive natural numbers from 1 to 9: 1; 2; 3; 4; 5; 6; 7; 8; 9
- Step 2: Calculate the sum of the listed natural numbers
- Step 3: Count how many numbers from 1 to 9: There are 9 numbers
- Step 3: Find the average = Sum of the 9 natural numbers : 9 (number of terms).
Answer:
The sum of consecutive natural numbers from 1 to 9 is:
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45
The average of consecutive natural numbers from 1 to 9 is:
45 : 9 = 5.
Answer: 5
Concise Guide to Solving Exercise 27 Math 4
Previously, you were instructed to solve Math 4 page 26 SGK - Practice, Seconds, centuries. In the math solving document, students will understand what the average is, the average is a number obtained by taking the sum of many terms and dividing by the number of terms taken. To find the average is quite simple, you need to calculate the sum of those numbers and divide that sum by the number of terms. These are basic theoretical knowledge updated in detail in the document, along with useful content from solutions and guidance to solve math exercises on page 27 SGK math 4 easily and effectively. Next, let's refer to the content of learning how to solve Math 4 page 28 SGK - Practice, Find the average, all detailed information will be updated clearly in the next article, invite you to refer for more details.
Here is the solution for Exercise 27 Math 4 in the math exercise solving section for 4th grade. Students can review the solution for Exercise 26 Math 4 solved earlier or preview the solution for Exercise 28 Math 4 to study Math for 4th grade better.
In Chapter 2 of Math for Grade 4, students will learn basic operations such as addition, subtraction, multiplication, and division. To excel in Grade 4 Math, students can refer to the hints for Solving Exercise on page 39 of Math textbook for Grade 4 about addition and the hints for Solving Exercise on page 40 of Math textbook for Grade 4 about subtraction.
