5 Seconds - A Game

Solve if you can in 5 seconds..

5 seconds is a simple but a powerful game designed for anyone from 5 to 100 years old,
Think of a calculator with a stopwatch built in, someone gives you a random number between 0 and 1000 and you try to add up numbers till you hit the target number they gave you. That is what 5 Seconds is in essence -a race using a calculator.Challenge your friends to solve the numbers in 5 seconds.