Adding and Subtracting Fractions

To add or subtract, two fractions must have...

• a monkey.

• unlike terms.

• common denominators.

• the same numerators.

Evaluate the expression:  $\frac{2}{3}+\frac{1}{6}$  

• 1

•  $\frac{5}{6}$  

•  $\frac{7}{8}$  

•  $\frac{3}{3}$  

Find the difference:  $\frac{5}{9}-\frac{3}{9}$  

• one ninth

• two ninths

• 8 ninths

• 3 ninths

 $\frac{4}{7}+\frac{1}{3}=$  

•  $\frac{17}{21}$  

•  $\frac{19}{21}$  

•  $\frac{5}{10}$  

•  $\frac{5}{21}$  

What is the least common denominator for 1/3 and 3/4?

• 6
• 4
• 3
• 12

The Ortega family made  $\frac{15}{16}$  pounds of confetti for the Annual Fiesta Celebration in San Antonio. They used  $\frac{1}{4}$  pound to make confetti filled eggs. How much confetti is left to use next year?

•  $\frac{11}{16}\$  pounds

•  $\frac{9}{16}$  pounds

•  $\frac{4}{5}$  pounds

•  $\frac{3}{4}$  pounds

What must you have to in order to add and subtract fractions?

• common numerators

• Different numerators

• common denominators

• different denominators

Click on all the PRIME numbers

• 2

• 7

• 49

• 29

• 51

 $\frac{1}{5}\ and\ \frac{5}{6}$  What number could be a common denominator for these two fractions:

• 30

• 11

• 6

• 12

Identify all the multiples of 4....

• 30

• 32

• 38

• 44

• 54