Baez has 25 marbles. She loses 20% of them one day. Then a friend sees her and gives her double the amount that Baez has after she lost them. How many marbles does Baez end up with?
She loses 5 marbles because 25 x .2 = <T>multiply(25, 0.2)=5.0
She has 20 marbles after this because 25 - 5 = <T>subtract(25, 5)=20
Her friend gives her 40 marbles because 20 x 2 = <T>multiply(20, 2)=40
Adding those marbles to the 20 she had before, she ends up with 40 marbles + 20 marbles = <T>add(40, 20)=60 marbles
