Question

Marcus are 1/3 of a pizza on Monday night. He then ate 1/4 of the remaining pizza on Tuesday. Which of the following expressions shows how much pizza Marcus ate in total?

Answer 1

B would be correct.

Explanation:

You have to subtract the 1/3 and 1/4 by the whole pizza (1) otherwise you never had a whole pizza according to your equation. By doing 1-1/3 you solve for the amount left on Monday, and when you subtract 1/4 from the number you just got, you have solved for the total amount left on Tuesday.

1-1/3=2/3

2/3-1/4= 2/3 * 4/4 - 1/4 * 3/3 =

8/12-3/12= 5/12 of a pizza left