Adding and Subtracting Fractions

Which fraction equals to 1?

•  $\frac{3}{4}$  
  

•  $\frac{3}{3}$  

•  $\frac{2}{4}$  

•  $\frac{1}{10}$  

Which fraction equals to 1?

• $\frac{5}{7}\ +\ \frac{2}{7}$

• $\frac{4}{7}+\frac{2}{7}$

• $\frac{5}{6}-\frac{1}{6}$

• $\frac{1}{4}+\frac{1}{4}$

Which Fraction equals to 3/8?

• $\frac{5}{8}-\frac{2}{8}$

• $\frac{1}{8}+\frac{2}{8}$

• $\frac{5}{8}-\frac{3}{8}$

• $\frac{8}{8}-\frac{5}{8}$

What is 1/6 more than 2/6?

• $\frac{5}{6}$

• $\frac{3}{12}$

• $\frac{1}{6}$

• $\frac{1}{2}$

 $\frac{2}{8}+\frac{1}{8}+\frac{3}{8}$  

•  $\frac{5}{8}$  

•  $\frac{6}{8}$  

•  $\frac{6}{24}$  

•  $\frac{1}{2}$  

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

 $\frac{5}{12}+\frac{1}{3}$  

•  $\frac{6}{12}$  

•  $\frac{3}{4}$  

•  $\frac{6}{15}$  

•  $\frac{9}{12}$  

 $\frac{7}{8}-\frac{5}{6}$  

•  $\frac{1}{24}$  

•  $\frac{2}{3}$  

•  $\frac{5}{6}$  

•  $\frac{4}{4}$  

Is this a correct answer?

• Yes, the student correctly added.

• No, you cannot add unlike denominators

• No, 5 + 7 is not 12

• No, 2 + 3 is not 5

 $\frac{7}{18}+\frac{1}{3}$  

•  $\frac{13}{18}$  

•  $\frac{8}{18}$  

•  $\frac{8}{21}$  

•  $\frac{2}{6}$