Billy collects marbles. Each marble in his collection weighs about 4 ounces. His collection weighs about 20 pounds in all. About how many marbles are in his collection?
There are 16 ounces in a pound so we can form a equation 20 x 16 = 320 Then, we do 320 divided by 4 which gives us the figure 80. Hope this has helped you.
