Question 1 of 5: Perform each indicated Operation.
Select the Correct Answer: Correct! 
Not Correct! 
Not Correct! A
$$\frac{1}{5}+\frac{2}{5}=\frac{3}{10},\frac{9}{10}-\frac{3}{10}=\frac{3}{5},\frac{11}{12}-\frac{5}{12}=\frac{1}{2}$$ $$\frac{1}{5}+\frac{2}{5}=\frac{3}{10}$$$$\frac{9}{10}-\frac{3}{10}=\frac{3}{5}$$$$\frac{11}{12}-\frac{5}{12}=\frac{1}{2}$$
B
$$\frac{1}{5}+\frac{2}{5}=\frac{3}{25},\frac{9}{10}-\frac{3}{10}=\frac{6}{5},\frac{11}{12}-\frac{5}{12}=\frac{6}{7}$$ $$\frac{1}{5}+\frac{2}{5}=\frac{3}{25}$$$$\frac{9}{10}-\frac{3}{10}=\frac{6}{5}$$$$\frac{11}{12}-\frac{5}{12}=\frac{6}{7}$$
C
$$\frac{1}{5}+\frac{2}{5}=\frac{3}{5},\frac{9}{10}-\frac{3}{10}=\frac{3}{5},\frac{11}{12}-\frac{5}{12}=\frac{1}{2}$$ $$\frac{1}{5}+\frac{2}{5}=\frac{3}{5}$$$$\frac{9}{10}-\frac{3}{10}=\frac{3}{5}$$$$\frac{11}{12}-\frac{5}{12}=\frac{1}{2}$$
D
$$\frac{1}{5}+\frac{2}{5}=\frac{3}{5},\frac{9}{10}-\frac{3}{10}=\frac{3}{10},\frac{11}{12}-\frac{5}{12}=\frac{1}{2}$$ $$\frac{1}{5}+\frac{2}{5}=\frac{3}{5}$$$$\frac{9}{10}-\frac{3}{10}=\frac{3}{10}$$$$\frac{11}{12}-\frac{5}{12}=\frac{1}{2}$$
E
$$\frac{1}{5}+\frac{2}{5}=\frac{3}{5},\frac{9}{10}-\frac{3}{10}=\frac{3}{10},\frac{11}{12}-\frac{5}{12}=\frac{7}{12}$$ $$\frac{1}{5}+\frac{2}{5}=\frac{3}{5}$$$$\frac{9}{10}-\frac{3}{10}=\frac{3}{10}$$$$\frac{11}{12}-\frac{5}{12}=\frac{7}{12}$$
Question 2 of 5: Perform each indicated Operation.
Select the Correct Answer: Correct! Not Correct!
Not Correct! A
$$\frac{3}{8}+\frac{4}{7}=\frac{12}{17},\frac{11}{15}-\frac{31}{45}=\frac{9}{13}$$ $$\frac{3}{8}+\frac{4}{7}=\frac{12}{17}$$$$\frac{11}{15}-\frac{31}{45}=\frac{9}{13}$$
B
$$\frac{3}{8}+\frac{4}{7}=\frac{7}{15},\frac{11}{15}-\frac{31}{45}=\frac{3}{14}$$ $$\frac{3}{8}+\frac{4}{7}=\frac{7}{15}$$$$\frac{11}{15}-\frac{31}{45}=\frac{3}{14}$$
C
$$\frac{3}{8}+\frac{4}{7}=\frac{53}{56},\frac{11}{15}-\frac{31}{45}=\frac{2}{45}$$ $$\frac{3}{8}+\frac{4}{7}=\frac{53}{56}$$$$\frac{11}{15}-\frac{31}{45}=\frac{2}{45}$$
D
$$\frac{3}{8}+\frac{4}{7}=\frac{3}{17},\frac{11}{15}-\frac{31}{45}=\frac{7}{43}$$ $$\frac{3}{8}+\frac{4}{7}=\frac{3}{17}$$$$\frac{11}{15}-\frac{31}{45}=\frac{7}{43}$$
E
$$\frac{3}{8}+\frac{4}{7}=\frac{13}{53},\frac{11}{15}-\frac{31}{45}=\frac{12}{23}$$ $$\frac{3}{8}+\frac{4}{7}=\frac{13}{53}$$$$\frac{11}{15}-\frac{31}{45}=\frac{12}{23}$$
Question 3 of 5: Perform each indicated Operation.
Select the Correct Answer: Correct! Not Correct!
Not Correct! A
$$\frac{7}{12}-\frac{1}{9}=\frac{6}{14},\frac{2}{9}+\frac{5}{18}=\frac{1}{2}$$ $$\frac{7}{12}-\frac{1}{9}=\frac{6}{14}$$$$\frac{2}{9}+\frac{5}{18}=\frac{1}{2}$$
B
$$\frac{7}{12}-\frac{1}{9}=\frac{17}{36},\frac{2}{9}+\frac{5}{18}=\frac{3}{4}$$ $$\frac{7}{12}-\frac{1}{9}=\frac{17}{36}$$$$\frac{2}{9}+\frac{5}{18}=\frac{3}{4}$$
C
$$\frac{7}{12}-\frac{1}{9}=\frac{7}{39},\frac{2}{9}+\frac{5}{18}=\frac{2}{9}$$ $$\frac{7}{12}-\frac{1}{9}=\frac{7}{39}$$$$\frac{2}{9}+\frac{5}{18}=\frac{2}{9}$$
D
$$\frac{7}{12}-\frac{1}{9}=\frac{17}{36},\frac{2}{9}+\frac{5}{18}=\frac{1}{2}$$ $$\frac{7}{12}-\frac{1}{9}=\frac{17}{36}$$$$\frac{2}{9}+\frac{5}{18}=\frac{1}{2}$$
E
$$\frac{7}{12}-\frac{1}{9}=\frac{17}{33},\frac{2}{9}+\frac{5}{18}=\frac{4}{5}$$ $$\frac{7}{12}-\frac{1}{9}=\frac{17}{33}$$$$\frac{2}{9}+\frac{5}{18}=\frac{4}{5}$$
Question 4 of 5: Perform each indicated Operation.
Select the Correct Answer: Correct! Not Correct!
Not Correct! A
$$\frac{1}{12}$$ $$\frac{1}{12}$$
B
$$\frac{9}{31}$$ $$\frac{9}{31}$$
C
$$\frac{3}{17}$$ $$\frac{3}{17}$$
D
$$\frac{13}{21}$$ $$\frac{13}{21}$$
E
$$\frac{151}{156}$$ $$\frac{151}{156}$$
Question 5 of 5: Perform each indicated Operation.
Select the Correct Answer: Correct! Not Correct!
Not Correct! A
$$\frac{20}{31}$$ $$\frac{20}{31}$$
B
$$\frac{29}{30}$$ $$\frac{29}{30}$$
C
$$\frac{13}{30}$$ $$\frac{13}{30}$$
D
$$\frac{145}{151}$$ $$\frac{145}{151}$$
E
$$\frac{179}{211}$$ $$\frac{179}{211}$$
