Method 1: You can subtract Pippi's six years old from Ningning's fourteen years old, and get that Ningning is eight years older than Pippi; Method 2: after two years, use Ningning's age, that is, fourteen years plus two years equals sixteen years, and after two years, subtract Pippi's age, that is, six years plus two years equals eight years, and finally get eight years old.

Age, Chinese vocabulary, Pinyin: niánlíng refers to the length of time from birth to calculation, usually expressed in years. Age is a natural sign with biological basis. After a person is born, with the passage of the sun and the moon, his age increases, which is an irresistible natural law.

People are breeding their own times at the same time, and the times are always composed of individuals of different ages born in different times. In addition, various demographic phenomena, such as marriage, childbearing, schooling, employment, migration and death, are closely related to everyone's age. Therefore, it is of great significance to calculate the age correctly. In addition, the length of time from the establishment of a city or a country to the calculation of its existence can also be called "age".