Answer:
So in the blanks there will be 1 , 2, 7, 3
An the expression is
Explanation:
We have given the expression

We know that

When we multiply 8000 by 1 it will be 8000
We know that
when we multiply 400 by 2
Then it will give 400×2 = 800
And 20×7 = 140
And 3×1 = 3
When we add all these numbers 8000+800+140+3 = 8943
So in the blanks there will be 1 , 2, 7, 3
An the expression is
