Adding and Subtracting Fractions

Adding and Subtracting Fractions

With like and unlike denominators

Multiple Choice

What is the top number of a fraction called?

• numerator

• denominator

• factor

• sum

Multiple Choice

What is the bottom number of a fraction called?

• numerator

• denominator

• fraction

• sum

Multiple Choice

When adding and subtracting fractions, what needs to be the same?

• the numerator

• the denominator

• nothing

• everything

Adding Fractions with Like Denominator

Multiple Choice

When adding fractions with like denominators, the denominators....

• stays the same

• are added together

Multiple Choice

 $\frac{2}{7}+\frac{1}{7}=$  

•  $\frac{2}{7}$  

•  $\frac{3}{7}$  

•  $\frac{3}{14}$  

Multiple Choice

 $\frac{5}{10}+\frac{3}{10}=$  

•  $\frac{8}{10}$  

•  $\frac{15}{10}$  

• 8

•  $\frac{8}{20}$  

Multiple Choice

 $\frac{24}{50}+\frac{7}{50}=$  

•  $\frac{30}{50}$  

•  $\frac{31}{50}$  

•  $\frac{30}{100}$  

•  $\frac{31}{100}$  

Subtracting Fractions with Like Denominators

Multiple Choice

 $\frac{9}{10}-\frac{3}{10}=$  

•  $\frac{6}{10}$  

•  $\frac{12}{10}$  

• 6

•  $\frac{6}{20}$  

Multiple Choice

 $\frac{3}{4}-\frac{1}{4}$  

• 2

•  $\frac{2}{4}$  

• 1

•  $\frac{2}{8}$  

Multiple Choice

 $\frac{9}{12}-\frac{6}{12}$  

•  $\frac{15}{12}$  

•  $\frac{3}{12}$  

•  $\frac{3}{24}$  

Adding and Subtracting Fractions with Unlike Denominators

Multiple Choice

When adding or subtracting fractions with unlike denominators, what is the first step?

• Add the numerators

• Add the denominators

• Find a common denominator

Multiple Choice

How can you find a common denominator?

• Pick your favorite number

• Add the denominators together

• Find a common multiple for the two denominators

Multiple Choice

After changing the denominator, what do you need to do to the numerator?

• Nothing

• Double it

• Multiply the numerator by the same number as the denominator

Multiple Choice

 $\frac{1}{2}+\frac{1}{4}=$  

•  $\frac{2}{6}$  

•  $\frac{3}{4}$  

•  $\frac{1}{6}$  

•  $\frac{2}{8}$  

Multiple Choice

 $\frac{6}{8}-\frac{1}{4}=$  

•  $\frac{4}{8}$  

•  $\frac{5}{4}$  

•  $\frac{5}{8}$  

• 1

Multiple Choice

 $\frac{2}{12}+\frac{3}{4}=$  

•  $\frac{5}{16}$  

•  $\frac{5}{12}$  

•  $\frac{11}{12}$  

Multiple Choice

 $\frac{3}{7}+\frac{1}{2}=$  

•  $\frac{4}{9}$  

•  $\frac{4}{14}$  

•  $\frac{13}{14}$  

•  $\frac{3}{9}$