Add the following 48+49+31+30 = _______

Hint: In this question at first we have to write the numbers in line and add them. An easy way is by making the last digit zero this way it is easy to add bigger numbers too.

Complete step-by-step answer:
This question is very interesting as it helps us to add the numbers, which is a very important concept as it helps in a lot of concepts in real life. It is always recommended to first arrange the numbers in such a way that it forms a number that has a zero in its last digit. Like in this question we arrange 49 after 31 (after taking ‘1’ as carry in the number by adding ‘9’ with ‘1’ and last digit becomes ‘10’ and 1 is taken carry in this case) so that it becomes 80 and then we add it with 30 and it becomes 110 and then with 48 that becomes 158 also in this way the sum or additions of numbers is easy. So it is always advised to make the last digit 0. Now coming to the question,
\[
  \begin{array}{*{20}{l}}
  { \Rightarrow 48 + 49 + 31 + 30} \\
  { \Rightarrow 48 + 80 + 30} \\
  { \Rightarrow 48 + 110}
\end{array} \\
   = 158 \\
 \]

Note- If you don’t understand the question in line then it can also be done by writing the numbers in the easier way (one below another) like this,
$\dfrac{
  \mathop {48}\limits^1 \\
  49 \\
  31 \\
  30 + \\
}{{158}}$
The question can also be done like this if you know this way. By these methods you will be able to solve the question and also be sure of your calculations.