G5 Fractions

Add.

 $\ \frac{1}{7}+\frac{3}{7}+\frac{4}{7}\ =$  

•  $\ \frac{6}{7}$  

• 1

•  $1\ \frac{1}{7}$  

•  $1\ \frac{2}{7}$  

Find the sum.

 $\frac{1}{2}+\frac{3}{8}$  

•  $\frac{4}{10}$  

•  $\frac{2}{5}$  

•  $\frac{7}{8}$  

•  $\frac{3}{4}$  

What is the least common denominator of  $\frac{3}{10}\ and\ \frac{7}{15}?$ 

• 60

• 30

• 15

• 10

Subtract.

 $\frac{3}{4}-\frac{5}{16}$  

•  $\frac{7}{16}$  

•  $\frac{5}{16}$  

•  $\frac{1}{3}$  

•  $\frac{1}{2}$  

Add. Simplify, if necessary.

 $\frac{5}{9}+\frac{1}{9}$  

Subtract. Simplify, if necessary.

 $\frac{9}{10}-\frac{3}{4}$  

Which fraction shows the difference  $\frac{7}{12}-\frac{1}{4}$  in simplest form?

•  $\frac{5}{6}$  

•  $\frac{4}{12}$  

•  $\frac{1}{3}$  

•  $\frac{6}{8}$  

Which number is NOT a common denominator of  $\frac{5}{6}\ and\ \frac{5}{9}$  ?

• 36

• 54

• 15

• 18

To find the least common denominator of fractions, I need to:

• find the least common multiple of the denominators.

• find the least common multiple of the numerators.

• find the greatest common factor of the denominators.

• find the greatest common factor of the numerators.

Fill in the blank:

The LCD for  $\frac{11}{12\ }\ and\ \frac{5}{9}$  is ___________.