Adding and Subtracting Fractions

Adding Fractions

100

1/8 + 1/8 + 1/8 = ?

3/8

200

4/8 + 4/8 = ?

8/8 = 1

300

Is the sum greater than, less than, or equal to 1?

1/3 + 1/3 + 1/3 + 1/3 = _____

4/3 is greater than 1 because 3/3 = 1

400

Is the sum greater than. less than, or equal to 1?

5/10 + 5/10 = ____

10/10 = 1

500

What is the sum of 8/8 and 8/8?

16/8 or 2

Subtracting Fractions

100

6/8-2/8 = ____

4/8 or 1/2

200

5/10-1/10 = ___

4/10

300

Is the difference greater than, less than, or equal to 1?

1 - 5/5 = ______

1= 5/5

5/5 - 5/5 = 0/5 = 0

0<1

400

1 - 2/3 = ____

3/3 - 2/3 = 1/3

500

What is the difference of 1 and 4/8?

8/8 - 4/8 = 4/8 or 1/2

Word Problems

100

Kelly buys some cloth.  She uses 5/8 of a yard for a shirt.  She used some of it to make a headband.  She has 2/8 of a yard left.  How much fabric did she use to make the headband?

5/8 - ? = 2/8

5/8 - 2/8 = ?

3/8 of a yard for fabric

200

Samir cuts his pita into 12 equal pieces.  He eats 2/12 of the pita and Zeynab eats 3/12 of the pita.  How much of the pita is left?

2/12 + 3/12 = 5/12 

1 - 5/12 = ?

12/12 - 5/12 = 7/12 of the pita

300

Mrs. O'Brien makes 1 pot of soup.  If she brings 1/3 of the pot for Mrs. Deloach, how much soup is left for Mrs. O'Brien?

1 - 1/3

3/3 - 1/3 = 2/3

400

Scarlett and Noah pick 9/10 of a bucket of blueberries together.  Noah picked 3/10 of the bucket.  How much of the bucket did Scarlett pick?

9/10-3/10 = 6/10 of a bucket

500

Mr. Drugan has a bunch of balloons.  3/10 of the bunch is red and 2/10 of the bunch is blue.  What fraction of the bunch is not red or blue?

3/10 + 2/10 = 5/ 10 blue and red

1 - 5/10 = 5/10 or 1/2 not blue or red

Language of Fractions

100

1/3 more than 2/3 is ______.

1/3 + 2/3 = 3/3 = 1

200

What is 4/8 less than 7/8 ?

7/8 - 4/8 = 3/8

300

What is 1/4 more than 2/4?

1/4 + 2/4 = 3/4

400

What is 6/10 less than 8/10?

8/10 - 6/10 = 2/10

500

What is a unit fraction?

A fraction that names one part of the whole.  A fraction with 1 in the numerator.