CPM Homework Help : MC1 Problem 8-119

Simplify each of the following expressions.

Hint:

Find the common denominators for both fractions. Once you have, divide the numerators to find the answer.

More Help:

The lowest common multiple of the numbers will also be the common denominator.

Steps (a):

$\text{The common denominator is 12, so }\frac{2}{3} = \frac{8}{12}.$

$\text{This means }\frac{2}{3} \div \frac{1}{12} = \frac{8}{12} \div \frac{1}{12}$

Now divide the numerators to solve.

Answer (a).

$\frac{8}{1}=8$

Answer (b):

Hint (d):

Change the mixed number to a fraction and then multiply.

Hint (e):

$\frac{7}{10} = 0.7,\text{ can you add the decimals?}$

Answer (e):

$5.9, \text{ or }5\frac{9}{10}$

Hint (f):

$2.75 =\frac{11}{4} \text{ and }3\frac{2}{5} =\frac{17}{5}$

Can you find the common denominator and subtract the fractions?