Paul has 1/2 gallon of water. He puts an equal amount in 5 bottles. Then he uses 1/3 from 1 bottle on a flower. What fraction of a gallon does Paul use on the flower?

Divide 1/2 into 5 bottles since she is splitting them into 5 bottles. So make 5 a repicoil, which just means to switch the numerator and denominator, then multiply. 1/2 x 1/5 = 1/10. It then says he uses 1/3 from 1 bottle. So we will have to divide again. So the repicoil of 1/3 is 3/1, now we can multiply. 1/10 x 3/1 is 3/10. Therefore, Paul used 3/10 of a gallon on the flower.