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Worksheets

Adding and Subtracting Fractions with Unlike Denominators

Total questions: 18

Worksheet time: 54mins

Name
Class
Date
1.
Is this a correct answer?
a)
Yes, the student correctly added.
b)
No, you cannot add unlike denominators
c)
No, 5 + 7 is not 12
d)
No, 2 + 3 is not 5
2.
What is the first step in solving this problem? 
⅘ + ½ =
a)
Add the top parts of the fraction
b)
Rewrite the fractions in the simplest form. 
c)
Find a common denominator. 
d)
Make each fraction into an improper faction. 
3.

Stacy used 1/4 cup of sugar and 2/3 cup of flour to bake a cupcakes. How much more flour did Stacy use than sugar?

a)

11/12 cup

b)

10/12 cup

c)

6/12 cup

d)

5/12 cup

4.

Jimmy filled a pitcher 1/2 of the way full with water. Carolyn filled a pitcher of the same size 5/6 of the way full with water. How much more water did Carolyn fill than Jimmy?

a)

1/6 more water

b)

2/3 more water

c)

1/3 more water

d)

3/6 more water

5.

Aden is helping his dad paint his house. They mixed 5/9 gallons of white paint and 1/6 gallons of blue paint. How many gallons was the mixture in all?

a)

6/18 gallons

b)

13/18 gallons

c)

4/5 gallons

d)

1/6 gallons

6.

When the denominators are not the same, I must find a...

a)

common numerator

b)

common denominator

c)

equivalent fraction

d)

mixed number

7.

When adding or subtracting fractions, I NEVER add or subtract the...

a)

numerators

b)

denominators

c)

mixed numbers

d)

equivalent fractions

8.

When adding or subtracting fractions, I always add or subtract the...

a)

numerators

b)

denominators

c)

mixed numbers

d)

equivalent fractions

9.

Once I have completed adding or subtracting fractions, I should always ____________ if possible.

a)

make equivalent fractions

b)

add again

c)

simplify

d)

multiply

10.

What is the best common denominator for this problem?

a)

5

b)

2

c)

20

d)

10

11.

What is the best common denominator for this problem?

a)

6

b)

8

c)

24

d)

48

12.

Find equivalent fractions with common denominators for the problem shown above.

a)

4/15 and 2/15

b)

24/30 and 20/30

c)

12/15 and 2/15

d)

12/15 and 10/15

13.

Find equivalent fractions and common denominators for the problem shown above.

a)

1/10 and 4/10

b)

5/10 and 4/10

c)

1/20 and 2/20

d)

5/10 and 2/10

14.

Solve.

a)

5/9

b)

1 4/9

c)

1 1/6

d)

7/9

15.

Solve.

a)

1 1/12

b)

7/12

c)

3/4

d)

1 1/2

16.

Solve.

a)

5/8

b)

23/40

c)

21/40

d)

1/2

17.

Solve.

a)

1 5/8

b)

1/8

c)

1/4

d)

1 1/4

18.

Solve.

a)

1 9/11

b)

2 5/11

c)

8/11

d)

5/22