Operations with Fractions and LCD/GCF

Addition of Fractions

100

Add the following Fractions

2/5 + 4/5

6/5 

or 

1  1/5

200

Add the following fractions

9/5 + 4/3

47/15 

or 

3  2/15

300

Add the following fractions

3/8 + 1/3

17/24

400

Add the following fractions

2/5 + 1/6

17/30

500

Add the following fractions

10/7 + 1/6

67/42

or

1  25/42

Subtraction of Fractions

100

Subtract the following fractions

5/4 - 3/4

1/2

200

Subtract the following fractions

5/3  - 1/3 =

4/3 

or 

1 1/3

300

Subtract the following fractions

15/16 - 5/8

5/16

400

Subtract the following fractions

7/8 - 4/5

3/40

500

Subtract the following fractions

9/5 - 5/8

47/40

or 

1  7/40 

Multiplication of Fractions

100

Multiply the following fractions

2/3 x 5/4

10/12

or

5/6

200

Multiply the following fractions

8/7 x 7/10

56/70

or

4/5

300

Multiply the following fractions

4/9 x 7/4

28/36

or

7/9

400

Multiply the following fractions

5/4 x 1/3

5/12

500

Multiply the following fractions

2/3 x 3/7

6/21

Finding LCD

100

What does LCD/LCM Stand for?

Least Common Denominator

and/or

Least Common Multiple

200

What is the LCM of 

2 and 6

6

300

What is the LCM of

3 and 7

21

400

What is the LCD of

3/5 and 4/3

15

500

What is the LCD of

6/7 and 8/9

63

Finding GCF

100

What does GCF stand for?

Greatest Common Factor

200

What are the factors of

8 (List all of the factors)

1   2   4   8

300

What are the factors of

16 (List all of the factors)

1   2   4   8   16

400

What is the GCF of

4 and 12

4

500

What is the GCF of

8 and 21

1