Comparing Using Subtraction


 
 
Concept Explanation
 

Comparing Using Subtraction

With the help of subtraction, we can compare two numbers.

By subtracting we can find by how much one number is greater than the other number.

Let us consider the following example;

Reena's father is 65 years old and her uncle is 43 years old. How many years is Reena's uncle younger than her father?

1. We will first analyse the statement

2. We will find the values that are given

In the question it is given that

Reena's father is 65 years old and her uncle is 43 years old.

So, Age of Reena's Father = 85 years

Age of Reena's Uncle = 43 years

3. We will find the quantity which is required

In the question it is asked that

How many years is Reena's uncle younger than her father?

To find the number of years Reena's uncle is younger

We will perform subtraction as we are supposed to find the no. of years Reena'a uncle is younger

55 - 43 = ?

We will perform the required operation

Hence the Reena's uncle younger than her father by 22 years.

Illustration 1: Sam needs 81 beads to make a necklace. He has 74 beads with him. How many beads does he need more?

A. 12

B. 7

C. 14

13

Answer: B

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