Question

Solve mentally$.$

$5,00,000-7896$

Answer 1

Given numerical expression is $5,00,000-7896$

For subtraction use the following steps$.$

• Change the first digit of minuend with its predecessor
• Replace every zero of minuend from left with $9$ and the last with $10$
• Subtract the number

$$\begin{gathered} 500000 \\ \underbrace{|}\underbrace{|}\underbrace{|}\underbrace{|}\underbrace{|} \\ 4999910 \end{gathered}$$

Now subtract

$$\begin{gathered} 4999910 \\ -7896 \\ \overline{492104} \end{gathered}$$

Hence$,$ the value of $5,00,000-7896$ is $4,92,104$