In 1977, with dozens of fires set daily and tourism in freefall, New York hired an artist to save the city. His infamous ...

Let's look at how to solve the sum 237 + 25. First, let's look at 237. This number has 2 hundreds, 3 tens and 7 ones. The number 25 has 2 tens and 5 ones. Now let's write this out as a column ...