Question

What should be added to $55$ to obtain $82$?

• A. $17$
• B. $33$
• C. $137$
• D. $27$

Answer 1

The correct option is D $27$

We need to find a number that when adds to to $55$ equals $82$.
$\Rightarrow ?+55=82$

To find the unknown number, we need to subtract $55$ from $82$.

Aligning both the numbers according to Place value (starting from the right) :

Placing the like terms of the digits together i.e. digits at ones place will be placed together and digits at tens place to be placed together.

We can't subtract $5$ from $2$.
So,we borrrow $1$ tens from $8$.
$1$ Tens = $10$ ones
Thus, at ones place , $10+2=12$


By subtracting $12$ ones from $5$ ones, we get $7$ ones.

Similarly, by subtracting $5$ tens from $7$ tens, we get $2$ tens.

Thus, the answer is $27$.