Question

find the difference between the number 687 and the number obtained by reversing the digits
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Answer 1

To find:

✠ The difference between the number 687 and the number obtained by reversing the digits.

Solution:

Here, in this question first we will reverse the digits of number 687, that is, starting from the last number, we will move towards first number. After reversing the digits of the number, we will subtract the greater number from the smaller to find out the difference between the two.

Subtraction:

The inverse process of addition is known as subtraction.

• If x and y are two integers, then x - y is equal to x + ( - y ). Similarly, y - x is equal to y + ( - x ).

Let's solve find...✧

➤ Given number = 687

➤ Reverse of the number = 786

➤ Difference = 786 - 687

➤ Difference = 99

∴ The between the number 687 and the number obtained by reversing the digits is 99.

Properties of Subtraction:

• Closure property: The difference of two integers is always an integer.

• If x is an integer, then x - 0 = x and 0 - x = - x.

• For any integer -x, we have - (-x ) = x.

• For any two different integers x and y; x - y ≠ y - x.

• For any integer x, y, z; ( x - y ) - z ≠ x - ( y - z )

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