Adding and Subtracting Dissimilar Rational Expressions

TRUE OR FALSE

In adding and subtracting fractions, simply add the numerators and then the denominators.

• TRUE

• FALSE

TRUE OR FALSE

To convert dissimilar to similar fractions, get the GCF of the fractions.

• TRUE

• FALSE

TRUE OR FALSE

The Least Common Multiple of 9 and 6 is 36.

• TRUE

• FALSE

TRUE OR FALSE
The LCD of  $\frac{1}{x^2}and\ \frac{1}{x^4}$  is  $x^4$  

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• FALSE

TRUE OR FALSE
Like fractions, rational expressions can only be combined if they have the same denominator.

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• FALSE

 $\frac{y}{7},\frac{y}{6}$  

Determine the LCD of the rational expression above.

• 35

• 42

• 48

• 49

 $\frac{5}{x},\frac{3}{2x}$  

Determine the LCD of the rational expression above.

• x

• 2x

•  $x^2$  

•  $2x^2$  
  

 $\frac{12}{r^2},\frac{5}{r^6}$  

Determine the LCD of the rational expression above.

•  $r^2$  
  

•  $r^4$  
  

•  $r^6$  

•  $r^8$  
  

 $\frac{7x}{5x^3},\frac{2x}{15x^4}$  

Determine the LCD of the rational expression above.

•  $5x^3$  
  

•  $5x^4$  
  

•  $15x^3$  

•  $15x^4$  
  

 $\frac{3y}{\left(x^2-4\right)},\frac{5y}{\left(x-2\right)}$  

Determine the LCD of the rational expression above.

•  $\left(x+2\right)\left(x-2\right)$  
  

•  $\left(x+2\right)\left(x+2\right)$  
  

•  $\left(x-2\right)\left(x-2\right)$  

•  $\left(x-2\right)$