Question

what should be subtracted from 12800 to get9847

Answer 1

Let x should be substracted from 12800 to get 9847.

so ...

12800 - x =9847
or..
12700-9847=x
or
x =2853

Answer 2

Concept: What should be subtracted from 'A' to get 'B'?

For this the required number = A - B

Here we have given, A = 12800 and B = 9847

Now, we shall apply the above concept.

The required number = 12800 - 9847

or, = 2953

Hence, the required number will be 2953

Remark: Similarly, if the question has asked in this form. What should be added in 'A' to get 'B'?

For this, the required number = B - A.