Question

Solve mentally$.$

$40,00,000-6,25,900$

Answer 1

Given numerical expression is $40,00,000-6,25,900$

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

$$\begin{gathered} 4000000 \\ \underbrace{|}\underbrace{|}\underbrace{|}\underbrace{|}\underbrace{|}\underbrace{|} \\ 39999910 \end{gathered}$$

Now subtract

$$\begin{gathered} 39991000 \\ -625900 \\ \overline{3374100} \end{gathered}$$

Hence$,$ the value of $40,00,000-6,25,900$ is $3374100$