Question

What will be the expanded form of number 1021?

Answer 1

If a four digit number abcd is given then it can be written in generalised form as : 1000xa + 100xb + 10xc + d
or ${10}^3$ x a + ${10}^2$ x b + $10$ x c + d
So 1011 can be written as = 1000 x 1 + 10 x 2 + 1
or ${10}^3$x1 +$10$x2 + 1