adding /subtracting rationals

-7.8 + (-0.8)

• 8.6
• -8.6
• 7
• -7

 $\frac{1}{5}+\left(-\frac{3}{5}\right)$  

•  $\frac{2}{5}$ 

•  $-\frac{2}{5}$  
  

•  $\frac{3}{5}$  

• -1

 $-2\frac{1}{4}-8\frac{2}{5}$  

•  $-6\frac{3}{20}$ 

•  $-10\frac{13}{20}$  

•  $-10\frac{1}{3}$  

•  $-6\frac{1}{20}$  
  

A recipe calls for  $\frac{1}{2}$  cup of sugar and  $\frac{1}{3}$  cup of cinnamon. What is the measure of the two ingredients combined?

•  $\frac{5}{6}$  cup

•  $\frac{2}{5}$  cup

•  $\frac{1}{6}$  cup

•  $\frac{1}{5}$  cup

 A girl's hair is  $12\frac{3}{8}$  inches long. If she has  $2\frac{1}{2}$   inches cut off, how long will her hair be?

•  $10\frac{1}{4}$  inches

•  $10\frac{13}{16}$  inches

•  $9\frac{7}{8}$  inches

•  $10\frac{7}{8}$  inches

When adding decimals with the same sign you.....

• subtract and take the sign of the larger number
• add the opposite
• add and keep the sign
• subtract and keep the sign

-23.4 - 3.4= 

• -20
• 26.8
• -26.8
• 20

 $-1\frac{7}{8}+\left(-3\frac{1}{2}\right)$  

•  $5\frac{3}{8}$  
  

•  $-5\frac{3}{8}$  
  

•  $1\frac{5}{8}$  
  

•  $-1\frac{5}{8}$  
  

 $-\frac{3}{4}-\left(-\frac{2}{3}\right)$  

•  $\frac{1}{12}$  
  

•  $-\frac{1}{12}$  
  

•  $-\frac{17}{12}$  
  

•  $-1\frac{5}{12}$  

 $\frac{5}{8}-\left(-\frac{7}{8}\right)$  

•  $1\frac{1}{2}$  
  

•  $2\frac{1}{2}$  
  

•  $-1\frac{1}{2}$  
  

•  $-2\frac{1}{2}$