Math Lab - Fractions

Math Lab - Fractions

Adding, subtracting, multiplying, and dividing fractions

Adding Fractions with Like Denominators

• Denominator stays the same

• Add the numerator

• Simplify if it is an improper fraction

Multiple Choice

 $\frac{6}{11}+\frac{2}{11}=$  

•  $\frac{12}{11}$  

•  $\frac{8}{11}$  

•  $1\ \frac{1}{11}$  

•  $\frac{12}{121}$  

Multiple Choice

 $\frac{2}{5}+\frac{3}{5}$  

• 1

•   $\frac{5}{25}$  

•  $\frac{6}{5}$  

•  $\frac{5}{10}$  

Adding Fractions with Unlike Denominators

• First you make the denominators the same. To do this you need to find the least common multiple for the denominators. Multiply both the numerator and denominator by the same number to make the fractions equivalent while having the same value for the denominator.

• Add the numerators together, the denominator will stay the same.

Multiple Choice

1/3 + 4/9 =

• 7/9
• 5/9
• 6/9
• 5/12

Multiple Choice

2/3 + 1/2 = 

• 6/7
• 2/6
• 3/5
• 7/6

Subtracting Fractions

• If the denominators are the same you can subtract the numerators and keep the same denominator.

• If the denominators are different you must find a common denominator and then subtract the numerator. The denominator will be common denominator.

Multiple Choice

1/2  -  1/8

• 5/8
• 2/5
• 3/8
• 5/6

Multiple Choice

7/8 - 7/12

• 7/24

• 1/4

• 7/12

• 4/24

Multiplying Fractions

• Multiply the numerators

• Multiply the denominators

• Simplify if possible

Multiple Select

What is 1/8 x 2/5

• 2/40

• 1/20

• 5/16

• 3 1/2

Dividing Fractions

• Keep the first fraction

• Change the multiply symbol to divide

• Multiply by the reciprocal of the second fraction

Multiple Choice

 $\frac{7}{8}\div\frac{3}{4}$  

•  $\frac{12}{56}$  

•  $\frac{56}{12}$  

•  $\frac{28}{24}$  

•  $\frac{21}{32}$  

Multiple Choice

2/5  ÷ 3/4

• 8/15
• 6/20
• 3/10
• 3/20

Poll

Rate your understanding of fractions:

• I can solve problems with fractions

• I think I have the hang of it, a little more practice would be appreciated

• Fractions are still confusing, but I think I can work through it

• I do not understand fractions at all