Liza bought 10 kilograms of butter to make cookies. She used one-half of it for chocolate chip cookies, one-fifth of it for peanut butter cookies, and one-third of the remaining butter for sugar cookies. How many kilograms of butter are left after making those three kinds of cookies?
Liza used 10/2 = <T>divide(10, 2)=5.0 kilograms of butter for the chocolate chip cookies.
Then, she used 10/5 = <T>divide(10, 5)=2.0 kilograms of butter for the peanut butter cookies.
She used 5 + 2 = <T>add(5, 2)=7 kilograms of butter for the chocolate and peanut butter cookies.
So, only 10 -7 = <T>subtract(10, 7)=3 kilograms of butter was left.
Then, Liza used 3/3 = <T>divide(3, 3)=1.0 kilograms of butter for the sugar cookies.
Therefore, only 3-1 = <T>subtract(3, 1)=2 kilograms of butter were left.
