<span>An underestimate will occur when all the figures (or a majority of them) are rounded downward significantly. By doing this, the estimated figure will necessarily be lower than the actual calculated figure. When rounding, knowing which direction the rounding is in will give a picture of what the figure's relation to the actual answer will be.</span>
After WWI, the USA did not have to rebuild its cities and infrastructures. It also became the creditor of European nations which had to borrow money to rebuild themselves.<span>It was not afected by war damages and it became a creditor economy.</span>
The greatest advantage that the untied had over the central powers that helped the Allies win World War 1 was a great manufacturing potential--another was that they were isolated from invasion.
