91Ó°ÊÓ

For baking the chocolate chip cookies and the oatmeal cookies, $\frac{1}{2}$cup of sugar for the chocolate chip cookies and $\frac{1}{4}$of sugar for the oatmeal cookies are required.

Assume the total amount of sugar required for baking be $x$.

The requirement of sugar for the chocolate chip cookies is $\frac{1}{2}$.

The requirement of sugar for the oatmeal cookies is $\frac{1}{4}$.

For baking the chocolate chip cookies and the oatmeal cookies, $\frac{1}{2}$sugar for the chocolate chip cookies and $\frac{1}{4}$of sugar for the oatmeal cookies are required.

Therefore, the total amount of sugar for baking is as follows:

$x=\frac{1}{2}+\frac{1}{4}$

Rewrite as equivalent fractions with the least common denominator, $4$.

Therefore, multiply the numerator and denominator of each fraction by a factor to get the denominator $4$.

$x=\frac{1}{2}·\frac{2}{2}+\frac{1}{4}·\frac{1}{1}$

Simplify.

$x=\frac{2}{4}+\frac{1}{4}$

Add the fractions.

$x=\frac{3}{4}$

Hence, the total amount of required for baking the chocolate chip cookies and the oatmeal cookies is $\frac{3}{4}$.