standard_description: Relate area to the operations of multiplication and addition.
problem_activity: Problem 1
Find the value of each of the following.
a.
$${{1\over4}}$$
of
$${{12}}$$
b.
$${{3\over4}}$$
of
$${{12}}$$
Problem 2
There are 21 students in the chess club.
$$2\over3$$
of them are girls. How many girls are in the chess club?


aligns: no