Least Common Denominator

Find the LCD

100

Find the LCD for 1/2 and 1/4

4

200

What is the LCD for 1/2 and 2/12?

12

300

What is the LCD for 3/4 and 3/8?

8

400

What is the LCD for 7/9 and 5/6

18

500

What is the LCD for 8/11 and 4/7?

77

Find the LCD #2

100

Find the LCD for 2 1/3 + 1 5/18

12

200

Find the LCD for 1 1/4 + 2 1/2

4

300

Find the LCD for 2 5/8 + 1 1/5

40

400

Find the LCD for 5 1/7 + 2 1/6

42

500

Find the LCD for 8 1/36 + 5 1/4

36

LCD Questions

100

To add or subtract mixed numbers, first find the ____ to make like fractions. 

Is it? 

-LCD least common denominator OR 

-Simplest form OR 

-Renaming

LCD

200

When you change 9 1/4 to 8 5/4 you are _______ the mixed number. Is it? 

-LCD (least common denominator)? OR 

-Mixed Numbers? OR 

-Renaming

Renaming

300

The least number that is a common multiple is the ______?

LCD

400

List the first six multiples for 7

7, 14, 21, 28, 35, 42

500

Write the least common multiple for the numbers: 6, 8

24

LCD Question #2

100

List the first 4 multiples of 10

10, 20, 30, 40

200

Which number is located on top in the fraction?

Numerator

300

If a fraction + fraction has a common denominator, it is called what?

Like fractions

400

What is the number called on the bottom of the fraction?

Denominator 

500

If a fraction + fraction do not have a common denominator, it is called what?

unlike fractions