Xiaohong is 5 years older than Xiao Ming Xiao Ming is 3 years younger than Xiao Gang The difference

Analysis: Xiaohong is five years older than Xiaoming, and Xiaoming's age plus five equals Xiaohong's age; Xiao Ming is better than Xiao Gang.

Three years younger, that is, Xiao Ming's age plus three years old, is Xiao Gang's age, so Xiao Hong and Xiao Gang are two years apart.

Xiaohong is 5 years older than Xiao Ming, and Xiao Ming is three years younger than Xiaogang, which means that Xiaohong is two years older than Xiaogang. That Xiaohong and Xiaogang are two years apart.

Because they all have Xiao Ming, Xiao Hong is 5 years older than Xiao Ming, and Xiao Gang is 3 years older than Xiao Ming.

So Xiaohong is 5-3=2 years older than Xiaogang.

Xiaohong is 5 years older than Xiaoming.

Xiao Ming is 3 years younger than Xiao Gang, in other words, Xiao Gang is 3 years older than Xiao Ming.

So Xiaohong and Xiaogang are both older than Xiao Ming.

Xiaohong minus Xiaogang, 5-2 3

So Xiaohong and Xiaogang are 2 years apart.

You can set Xiao Ming is x years old, Xiao Hong is 5 years older than Xiao Ming, then Xiao Hong has x+5 years old, Xiao Ming is 3 years younger than Xiao Gang, then Xiao Gang has x + 3 years old, Xiao Hong is X + 5 - (x + 3) = 2 years old than Xiao Gang, Xiao Hong and Xiao Gang are 2 years apart.

Xiaohong 1 Xiao Ming = 5, Xiao Ming = Xiao Gang -3, Xiao Hong 1 (Xiao Gang -3) = 5, Xiao Hong 1 Xiao Gang 10 3 = 5, Xiao Hong 1 Xiao Gang = 2 years old, Xiao Hong and Xiao Gang are 2 years apart.

Xiaohong is 5 years older than Xiaoming. Xiao Ming is 3 years younger than Xiao Gang;

5 years + 3 years = 8 years;

Xiaohong and Xiaogang are (8) years apart.

Xiaohong is 5 years older than Xiao Ming, Xiao Ming is 3 years younger than Xiaogang, and the difference between Xiaohong and Xiaogang is (2) years.

Xiaohong is 5 years older than Xiaoming.

Xiao Ming is three years younger than Xiao Gang and said:

Xiao Gang is 3 years older than Xiao Ming.

Year. So Xiaohong is 2 years older than Xiaogang.

According to the title, Xiaogang and Xiaohong are both older than Xiaoming, so the difference between Xiaohong and Xiaogang is 5 3 = 2 years.

Xiaohong is 5 years older than Xiaoming.

Xiao Gang is 3 years older than Xiao Ming.

So Xiaohong is 2 years older than Xiaogang.

Xiaohong and Xiaogang.

Difference of (2) years.

Note that Xiaohong and Xiaogang are both older than Xiaoming.

5-3 = 2 years old.

According to the question, you can calculate the difference between the little red and the small hang:

5-3 = 2 years old.

You can push one condition and one condition backward, Xiaohong is five years older than Xiao Ming, and Xiao Ming is three years younger than Xiao Gang, that is to say, Xiao Gang is three years older than Xiao Ming, with Xiao Ming as the benchmark, Xiao Hong is two years older than Xiao Gang, that is to say, the age difference between the two is two years.

Xiaohong is five years older than Xiao Ming, Xiao Ming is three years younger than Xiao Gang, let Xiaohong be x, Xiao Ming is x 5, x-5+3 is equal to x-2, so Xiaohong is two years younger than Xiao Gang.

Xiao Ming is 3 years older than Xiao Hong, and if Xiao Hong is 10 this year, then Xiao Ming is 13 years old.

Characteristics of Age QuestionsIn the process of solving the problem, we should keep the following characteristics in mind:1The age difference between any two people is not the same, and the age difference between them is a fixed constant over time, as long as both subjects have been in existence.

2.Any change in the multiplier relationship between the ages of two people. 3.

With each passing year, everyone grows a year older.

Age Basics:

Age problem refers to the study of age changes and relationships between two or more people, many candidates do not know where to start after encountering the age problem, below we will learn about the relevant solutions to the age problem. Common MethodsWhen solving problems, the commonly used methods are equation method, list method and substitution elimination method.

In the middle of most age problems, we can use the equation method to solve the problem, let the required value be x, and find the equivalent relationship in the problem to solve the problem jointly.

Example: Mr. Zhang is 70 years old and he has three grandchildren, the eldest grandson is 20 years old, the second grandson is 13 years old and the younger grandson is 7 years old. Ask how many years later, the sum of the ages of the three grandchildren is the same as the age of the grandfather.

10 Analysis: From the meaning of the question, it can be seen that after x, the sum of the ages of the three grandchildren is the same as that of the grandfather, then it can be known that 20+x+13+x+7+x=70+x, and the solution is x=15, and item b is selected.

The list method is actually an extension of the equation method, when the problem is more difficult, we can not intuitively see the proportional relationship by only listing the equation, so we need a list to solve, so that it is easier to see the equivalent relationship. For example, the sum of the ages of Xiao Ming's parents this year is 6 times that of Xiao Ming, and the sum of the ages of Xiao Ming's parents will be 5 times that of Xiao Ming four years later.

It is known that Xiao Ming's father is 2 years older than his mother, so how old is Xiao Ming's father this year. Analysis: Set Xiaoming is x years old this year.

It can be seen that (6x+8)=(x+4) 5 gets x=12, parents and 72, and father is 37 years old.

Little Red is big, 1 year older.

The first solution: 4-3 = 1 (years).

The second solution of the first Hu guess:

Set Xiaohong to be 5 years old.

Xiaolan's age: 5-4=1 (years).

Xiaohua's age: 1+3=4 (the age is not rotten).

Poor shape of phase pants: 5-4 = 1 (years).

5-3 = 2 years old.

A: After 3 years, Xiao Ming is 2 years older than Xiao Hong.

3 years later, Xiao Ming is 2 years older than Xiao Hong.

5-3-2 years old.

Answer: Xiao Ming is 2 years older than Xiao Hong.

The age difference doesn't change.

Xiaohong is 5 years older than Xiao Ming, and Xiao Ming is 3 years younger than Xiao Gang

Xiaohong and Xiaogang are (2) years apart.

Hello, according to the information you provided, Xiao Ming is the oldest, and the youngest is Xiao Fang. Xiao Ming is 3 years older than Xiao Hong, and Xiao Fang is 2 years younger than Xiao Hong, so Xiao Ming is the oldest, and Xiao Fang is the youngest.

Mathematically speaking, if the age of Xiao Ming's union is x, Xiao Hong's age is y, and Xiao Fang's age is z, then Xiao Ming is 3 years older than Xiao Hong, and Xiao Fang is 2 years younger than Xiao Hong, so x=y+3, z=y-2, so x>z, that is, Xiao Ming's age is the largest, and Xiao Fang's age is the youngest.

Xiao Ming is three years older than Xiao Hong, so Xiao Ming is older than Xiao Hong. Xiao Ming is two years younger than Xiao Fang, so Xiao Fang is older than Xiao Ming. After comparison, I know that Xiaofang is the largest.

Xiaohong is seven years older than Xiaodong, Xiaodong is three years younger than Xiaoli, which is older and how much older is Xiaohong or Xiaoli?

Little Red Big, Big :

7-3 4 years old.

The answer is that Xiaohong is seven years older than Xiaodong, Xiaodong is three years younger than Xiaoli, Xiaohong and Xiaolibi, Xiaohong is big, and Omori is four years earlier.

Of course, Xiaohong is bigger, 7-3=4!

Xiaohong is four years older than Xiaoli!

Solution: By known conditions can be used to know the cavity of the grip, their age and minus 3. It is 1+2 3 times that of Xiaogang's middle-aged age.

Therefore, Xiao Gang's age is equal to (28-3) (1+2 3)=25 5 3=25 3 5=5 3=15 (age of Pishan), and Xiao Ming's age is 28-15=13 (years old).

Ask Xiaogang. What fraction of Red's age is?

Xiao Ming's age is 1 3 older than Xiao Hong, then Xiao Hong's age is Xiao Ming's 1 (1+1 3)=3 4;

If the decimal is 1 and 3 is smaller than Xiao Ming, then Xiao Ming's age is 1-1 3=2 3;

Xiaogang's age is (3 4) (2 3) = 9 8.