There were some snowflakes at first. It snowed an additional 4 snowflakes every 5 minutes. If there were 58 snowflakes after 1 hour, how many snowflakes were there at first?
There are 60/5=<T>divide(60, 5)=12.0 5-minute intervals in 1 hour.
12*4=<T>multiply(12, 4)=48 snowflakes fell in 1 hour.
There were 58-48=<T>subtract(58, 48)=10 snowflakes at first.
