Adding and Subtracting Fractions
Simplify/Reduce
Greatest Common Factor
Least Common Multiple
100

Add: 1/3 + 1/6 

3/6 or 1/2

100

Reduce the fraction: 5/10

1/2

100

What is the Greatest Common Factor of the numbers 18 and 20?

2

100
What is the Least Common Multiple of the numbers: 8 and 12

24

200

Subtract: 6/8-1/2

2/8 or 1/4

200

Reduce the fraction: 8/12

2/3

200

What is the Greatest Common Factor of the numbers 12 and 30?

6

200

What is the Least Common Multiple of the numbers 4 and 9

36

300
Add: 1/3 + 5/12

9/12 or 3/4

300

Reduce the fraction: 10/12

5/6

300

What is the Greatest Common Factor of the numbers 25 and 30?

5

300

What is the Least Common Multiple of the numbers:5 and 7

35

400

Subtract: 13/18 - 1/6

10/18 or 5/9

400

Reduce the fraction: 20/50

2/5

400

What is the Greatest Common Factor of the numbers 15 and 60?

15

400

What is the Least Common Multiple of the numbers: 6 and 10

30

500

Add: 2/3 + 5/24

21/24

500

Reduce the Fraction: 25/100

1/4

500

What is the Greatest Common Factor of the numbers 80 and 100

20

500

What is the Least Common Multiple of the numbers: 15 and 30

30