Question

The Chemistry Cafe was out of bread. The cook went next door to the bakery and bought a loaf of bread which has 33 slices. Then, she sells 12 sandwiches (two pieces of bread per sandwich). How much bread did she have left? Explain your answer.​

Answer 1

In the question, we are told that there are;

• A loaf containing 33 slices
• A loaf containing 33 slices A package of cheese containing 15 slices

We also know that he is making a sandwich that has 2 pieces of both cheese and bread.

Hence;

Total number of bread and cheese = 33 + 15.

Each loaf should have two pieces of each bread and the cheeses make a total of four pieces.

Therefore he can make = 33 + 15/4 = 12 sandwiches.

Answer 2

The cook uses 2 slices of bread per sandwich. Which is equivalent to (the slices of bread) x (the total number of sandwiches) = total number of bread slices used. In this case 2 x 12 =24 slices used. Since the loaf of bread had 33, subtract the slices of bread used, 24. This results in 33-24= 9 slices of bread remaining.