Can you put a frog in with your red eared slider and your yellow belly turtles?

First of all, a 10 gallon tank is too small for a turtle, let alone a turtle AND a frog! The proper rule of thumb for aquatic turtles is 10 gallons for every inch of turtle... if you have a 4 inch long turtle, you need at least 40 gallons of water. And second of all, putting a frog with a slider of any age will mean a fed turtle. The turtle WILL eat the frog. Don't try it.