Subtract Fractions with Like Denominators

Subtract Fractions with Like Denominators

Multiple Choice

In a fraction, the number below the fraction bar that represents the total number of equal parts in one whole is the

• numerator

• denominator

• fracton

• unit fraction

Multiple Choice

  $\frac{1}{8}$  +  $\frac{6}{8}$  =

•  $\frac{6}{8}$  

•  $\frac{7}{16}$  

•  $\frac{7}{8}$  

• Answer not here

What is a like denominator?

A like denominator is a denominator that is the same. This means that the whole has been divided up into the same number of parts.

Multiple Choice

Do the fractions

 $\frac{5}{6}$  and  $\frac{5}{7}$  have like denominators

• yes

• no

Multiple Choice

 

Do the fractions  $\frac{7}{10}$  and  $\frac{3}{10}$  have like denominators

• yes

• no

We could just count the parts that are unlabeled to get our answer. But there is other ways to solve this problem.

Another way to solve this problem is to determine the whole fraction that equals 1 whole in this model. Remember that in order for a fraction to equal a whole the numerator and denominator are the same.

Tre has already run  $\frac{3}{8}$  of the race. What fraction of the race does he have left?

The whole race =1 or  $\frac{8}{8}$  , so to solve just subtract the numerators.

  $\frac{8}{8}$  -  $\frac{3}{8}$  = $\frac{5}{8}$  

Multiple Choice

 $\frac{3}{5}$  -  $\frac{1}{5}$  =

•  $\frac{4}{5}$  

•  $\frac{2}{0}$  

•  $\frac{2}{5}$  

•  $\frac{3}{25}$  

Multiple Choice

 $\frac{9}{10}$  -  $\frac{3}{10}$  =
Don't forget to simplify, if possible.

•  $\frac{6}{10}$  

•  $\frac{3}{5}$  

•  $\frac{12}{10}$  

•  $\frac{12}{20}$  

Multiple Choice

Ashia wrote a subtraction problem that has a difference of  $\frac{1}{3}$ Which problem did she write?

•  $\frac{2}{5}$  -  $\frac{1}{5}$  

•  $\frac{5}{6}$  -  $\frac{4}{6}$  

•  $\frac{5}{9}$  -  $\frac{2}{9}$  

•  $\frac{3}{8}$  -  $\frac{1}{8}$  

Multiple Choice

In Mrs. Nunn's class,  $\frac{2}{14}$    of the students are wearing white shirts. What fraction of the students are not wearing white shirts? Write in simplest form.

•  $\frac{2}{14}$  

•  $\frac{12}{14}$  

•  $\frac{1}{7}$  

•  $\frac{6}{7}$  

Multiple Choice

Jerrall ran 1/4 mile in the morning and 2/4 mile in the afternoon. If he wants to run a full mile, how much more does Jerrall have to run?

• $\frac{3}{4}$

• $\frac{3}{8}$

• $\frac{1}{4}$

• 1