Problema Solution
Mom has 42 rocks in her collection. If each showcase holds 12 rocks, how many more rocks does she need to fill three cases.
Answer provided by our tutors
If each case holds 12 rocks then 3 casses will hold 3 * 12 = 36 rocks.
Since Mom has 42 rocks in her collection and 42 > 36 this means that she doesnt need more rocks to fill the three cases - they are already filled!