Question

There are 365 days in a year. How do you find the number of days in 3 years?

Answer 1

Hint: We will look at the concept of multiplication. We will see how multiplication and addition are related by definition. We will look at some examples to understand this concept. Then we will use this concept of multiplication to find the number of days in 3 years. We will use the information given in the question as one factor in the binary operation multiplication.

Complete step by step answer:
Multiplication is a binary operation. We multiply two numbers to obtain a product. The numbers that are being multiplied are called factors. If we have to multiply more than two numbers then the order of multiplying more than two numbers does not affect the resulting product. This property of multiplication is called a commutative property.
We have a multiplicative identity or it is also called the identity element. This identity element is the number that when multiplied to another number gives back the number itself. So, when we are multiplying numbers, this identity is the number 1. We can see that if $a$ is a number and we multiply it by 1, we get $a\times 1=a$.
Now, while multiplying two numbers $a$ and $b$, we write it as $a\times b$ and say it as $a$ times $b$. This means that we will add the number $b$ to itself for $a$ times. For example, if we have 2 times 4, we add 4 to itself 2 times. That is, $2\times 4=4+4=8$. One more example is $3\times 5=5+5+5=15$.
We are given that one year has 365 days. We have to find the number of days in 3 years. This means that we will add 365 to itself 3 times. That is, $365+365+365=3\times 365=1095$.

Therefore, there are 1095 days in 3 years.

Note: The elementary mathematical operations are very important. These are binary operations, that means they can combine two numbers according to the definition of the operation. These operations are addition, subtraction, multiplication and division. We should be familiar with these operations and their properties.