Question

simply (5x10 3 power) +(4x10 2 power)+(5x10 1 power) +(1x10 zero power)

Answer 1

5 * 10^3 + 4 * 10^2 + 5 * 10^1 + 1 * 10^0

= 5 * 1000 + 4 * 100 + 5 * 10 + 1 * 1

= 5000 + 400 + 50 + 1

= 5451