Question

In 2013, the population of a town was recorded as 648453. In 2012, its population 429315. How much more was the population in 2013, than year 2012?

Answer 1

Hint: Subtract the population of the town in 2012 from the population of the town in 2013 to get how much the population increased in 2013 than the population of 2012. Result after subtracting both the population is the answer of the question.

Complete step-by-step solution -
Here, it is given that the population of the town in 2013, was recorded as 648453 and in 2012, population of the town was 429315 and hence, we need to determine the increase in population 2013 than 2012. So, we need to find how much 648453 is more than 429315. It means we have to subtract both the population to get the increase in population.
So, let us subtract 429315 from 648453.
Now, as both numbers have 5 digits, it means we have to write the numbers in following way:
\[\underline{\begin{matrix}
   {} & 6 & 4 & 8 & 4 & 5 & 3 \\
   - & 4 & 2 & 9 & 3 & 1 & 5 \\
\end{matrix}}\]
Now, we need to subtract the numbers from the last digits of them. And continue the subtraction process from last to their first digits.
So, we get subtraction of the given numbers as
\[\underline{\begin{align}
  & \underline{\begin{matrix}
   {} & 6 & 4 & 8 & 4 & 5 & 3 \\
   - & 4 & 2 & 9 & 3 & 1 & 5 \\
\end{matrix}} \\
 & \begin{matrix}
   {} & 2 & 1 & 9 & 1 & 3 & 8 \\
\end{matrix} \\
\end{align}}\]
Now, we get subtraction of both the numbers 648453 and 429315 as 219138 i.e. the difference in the population of the town in the year 2013 and 2012 is 219238. In other words, we can say that the population of the town in 2013 is more than the population in 2012 by 219138.
Hence, the answer of the question is 219138.

Note: One may go wrong, if he/she adds the given population of the town for both the years. So, always take care with the words in these kinds of questions. Taking care with the mathematical calculation while doing subtraction of both the numbers. Don’t subtract from the starting of the digits and follow the other rules of subtraction as well. Always cross check the result found by subtraction of two numbers by adding the result to the subtracted number and it should be equal to the number from which subtraction is done.