Adding & Subtracting Fractions

Adding Fractions with Common Den.

100

1/2 + 1/2 =

2/2 or 1 whole

200

1/4 + 5/4 =

6/4 or 1 2/4 or 1 1/2

300

5/16 + 7/16=

12/16 or 3/4

400

50/100 + 25/100=

75/100 or 3/4

500

1,000/2,000 + 500/2,000

1,500/2,000

Adding Fractions with Diff. Den.

100

1/2 + 1/4=

3/4

200

1/3 + 2/6 =

4/6 or 2/3

300

3/4 + 2/8 =

8/8 or 1 whole

400

2/7 + 3/5 =

31/35

500

2/5 + 1/3 =

11/15

Subtracting Fractions with Common Den.

100

2/2 - 1/2 =

1/2

200

3/4 - 1/4 =

2/4 or 1/2

300

5/6 - 2/6 =

3/6 or 1/2

400

100/100 - 50/100 =

50/100 or 1/2

500

1,000/3,000 - 700/3,000 =

300/3,000

Subtracting Fractions with Diff. Den.

100

2/5 -1/3 =

1/15

200

3/4 - 2/5 =

7/20

300

4/9 - 1/6

5/18

400

3/5 - 1/8 =

19/40

500

4/9 - 1/6 =

29/24 or 1 5/24

Vocabulary

100

what are these called? 1/2, 1/3, 1/4, 5/23

FRACTIONS

200

What is the top number in a fraction called?

The Numerator

300

What is the bottom number called in a fraction?

A Denominator

400

When we add or subtract fractions with different denominators, what do we have to do before we add or subtract them? 

Find a common denominator.

500

What is it called when you have a number bigger in the numerator? Example: 13/4

Improper Fraction