Adding/Subtracting Unlike Fractions

Multiples

100

Which is true?

A. Multiples of 30: 30, 60, 90, 120

B. Multiples of 30: 1, 2, 3, 5, 6, 10, 15, 30

A

200

List the first 5 multiples of 4

4, 8, 12, 16, 20

300

Which multiples are missing?

25, 50, ____, 100, ____, 150

75, 125

400

Which is NOT a multiple of 3?

3

12

8

21

8

500

You are adding the 3 fractions below. Find the multiple that will take the place of your new denominator. You do NOT need to add or subtract.

1/2

1/4

1/5

20

Word Problems

100

Joey ran 9/10 of a mile.

Mary ran 4/5 of a mile.

How much further did Joey run?

1/10

200

A dog is 

1/2 Bulldog

1/5 Chihuahua

___/10 Great Dane

What fraction of the dog's breed is Great Dane?

3/10

300

3/6 of the zoo's animals are spending the majority of their day inside due to the colder weather.

1/3 of the zoo's animals spend the majority of their day outside. 

The rest of the animals are sick. What fraction of the zoo animals are not inside OR outside? (Use 6 as your denominator)

1/6

400

McKenzie eats 2/3 of her pizza.

Later, she eats 1/5 of her pizza.

What fraction did she eat in all?

13/15

500

Anna needs 1/2 cup milk, 2/3 cup water, and 3/4 cup oil for a recipe.

Write the MIXED NUMBER of the fraction of liquid needed for the recipe (2 steps!)

1 11/12

Basic Adding

100

What is 2/5 + 3/10?

7/10

200

What is 2/7 + 3/5?

31/35

300

What is 3/11 + 1/2?

17/22

400

What is 5/6 + 1/8 + 1/24?

1 or 24/24

500

What is 1/4 + 2/3 + 1/6?

Write this fraction as a mixed number

1 and 1/12

Basic Subtracting

100

I have 1/2 gallon of milk. I drink 1/3 of it. How much remains?

1/2 - 1/3 =

1/6

200

15/20 - 2/5 =

7/20

300

I have a board that is 1 yard in length. We will represent the start of the board as 36/36 yards.

How much of the board is remaining if cut off 2/9 of a yard?

36/36 - 2/9 =

28/36

400

My sister ate 1/6 of my birthday cake. My mom ate 1/6 also, and I ate 1/3. How much cake is left?

6/6 - 1/6 - 1/3 = 

Is this fraction >< or = to 1/2?

3/6

500

There are 10 cows. 3/10 are in the barn. 3/5 are in the field. How many cows (or what fraction of cows) are NOT in the barn OR field?

10/10 - 3/10 - 3/5 = 

1/10 or 1 cow

Check for Equivalence

100

Which is NOT equivalent to 1/2?

2/4

5/10

3/8

6/12

3/8

200

Which of the following is equivalent to 6/7?

12/16

36/42

6/70

1/4

36/42

300

Write 3 fractions that are equivalent to 3/4

Responses may vary

Examples: 6/8, 9/12, 12/15

400

Which pair is false?

3/8 = 30/80

6/9 = 24/36

1/5 = 20/100

5/6 = 25/36

5/6 = 25/36

500

Each fraction is equivalent to 1/5, but has either the wrong numerator or the wrong denominator. Rewrite the 3 fractions correctly. 

5/20

20/125

2/11

(Hint: If the smaller numerator doesn't fit into the larger numerator, or the smaller denominator doesn't fit into the larger denominator, then you know that is the part of the fraction that needs to change)

5/25

20/100 or 25/125

2/10