5th Ch 3 Adding & Subtracting Fractions Review

+/- with Like Denominators

1

1/6 + 4/6

5/6

1

3/4 - 1/4

1/2

1

9/10 - 7/10

1/5

1

2 + 4/12

2 1/3

1

1 - 1/8

7/8

+/- with Unlike Denominators

1

1/4 + 5/8

7/8

1

2/5 + 1/2

9/10

1

7/12 - 1/2

1/12

1

5/6 - 2/12

3/4

1

3/12 - 1/8

1/8

Adding Mixed Numbers with Unlike Denominators

1

4 1/6 + 9 2/3

13 5/6

1

8 1/4 + 8 5/6

17 1/12

1

8 4/6 + 4 3/5

13 4/15

1

8 7/9 + 2 2/3

11 12/27

1

10 5/6 + 8 14/15

19 23/30

Subtracting Mixed Numbers with Unlike Denominators

1

7 3/4 - 1 1/12

6 2/3

1

11 1/2- 7 3/8

4 1/8

1

17  -  8 2/3

8 1/3

1

7 4/5 - 2 9/10

4 9/10

1

9 1/2 - 5 8/12

3 5/6

Improper Fractions and Mixed Numbers

1

What is 8/7 written as a mixed number?

1 and 1/7

1

What is 1 and 2/3 written as an improper fraction? 

5/3

1

What is 14/3 written as a mixed number?

4 and 2/3

1

What is 8 and 20/21 written as an improper fraction? 

188/21

1

what is 154/13 written as a mixed number?

11 and 11/13

Vocabulary for Working with Fractions

1

3 and 4/6 is an example of a ____________

Mixed Number

1

12/7 is an example of an _______________.

improper fraction

1

Fractions must have the same _________ before adding or subtracting. (Hint: This is the 1st step when adding or subtracting fractions)

denominator

1

Use __________ fractions after finding the LCM or common denominator before adding or subtracting. (Hint: This is the 2nd step when adding or subtracting fractions)

equivalent

1

True or False?  It is physically impossible for pigs to look up into the sky.

true