Adding and Subtracting Fractions with Unlike Denominators

Adding Fractions

100

What is 1/3+1/5?

8/15

200

What is 3/4+3/8?

1 1/8

300

What is 6/9+3/10?

29/30

400

What is 15/18+5/12?

25/36

500

What is 10/15+4/20?

13/15

Subtracting Fractions

100

What is 3/9-2/18?

2/9

200

What is 4/6-2/8?

5/12

300

What is 4/20-1/3?

2/15

400

What is 2/3-3/8?

7/24

500

What is 7/9-3/8?

29/72

Adding mixed numbers

100

1 1/4 + 4 1/4

5 2/4

200

2 1/2 + 3 1/2

6

300

2 1/3 + 3 1/9

5 4/9

400

3 1/12 + 4 1/5

7 17/60

500

1,397,203 1/3 + 423,867 3/5

1821070 14/15

Subtracting mixed numbers

100

1 1/2 - 1/2

1

200

3 2/3 - 2 1/3

1 1/3

300

3 1/3 - 1 1/4

2 1/12

400

5 1/5 - 2 2/3

2 8/15

500

3,246,800 2/5 - 429,859 1/2

2816940 9/10

Mixed Word Problems(addition/subtraction)

100

Johnny and Elizabeth were playing a video game and trying to get all of the treasure. Johnny got 1/3 of the treasure. Elizabeth got 5/9 of the treasure. Together, Johnny and Elizabeth got what fraction of the treasure?

8/9

200

Heba ate 1/12 of a box of cereal. Now the box is 3/4 full. What fraction of a full box was there before Heba ate

10/12=5/6

300

Two cats, Fluffy and Fireball, met in the park. Fluffy's tail is 1/3 of a meter long. Fireball's tail is 1/4 of a meter long. How much longer is Fluffy's tail than Fireball's tail?

1/12

400

At the party, Aisha and her friends ate 2 1/2 pizzas. After the party, there were 1 1/8 pizzas left. How many pizzas were there at the start of the party?

3 5/8 pizzas

500

In making macaroni and cheese, Jenny used 3/4 of a cup of cheddar and 1/2 of a cup of parmesan. How much cheese did Jenny use in all?

1 1/4