Adding & Subtracting Fractions Review

+/- with Like Denominators

100

1/6 + 4/6

5/6

200

3/4 - 1/4

1/2

300

BAHAHAHA .... your team losses 200 points

:'(

400

2 + 4/12

2 1/3

500

1 - 1/8

7/8

+/- with Unlike Denominators

100

100 Free Points! 

:)

200

2/5 + 1/2

9/10

300

7/12 - 1/2

1/12

400

5/6 - 2/12

3/4

500

3/12 - 1/8

1/8

Vocabulary for Working with Fractions

100

Answers must be ___________. (Hint: This is the last step you should always complete when working with fractions.)

What is simplified?

200

12/7 is an example of an _______________. This is not in the simplest form!

What is an improper fraction?

300

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

What is denominator?

400

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

What is equivalent?

500

Numbers that you use to make comparisons and estimates

Benchmarks

Adding Mixed Numbers with Unlike Denominators

100

4 1/6 + 9 2/3

13 5/6

200

8 1/4 + 8 5/6

17 1/12

300

8 4/6 + 4 3/5

13 4/15

400

8 7/9 + 2 2/3

11 12/27

500

10 5/6 + 8 14/15

19 23/30

Subtracting Mixed Numbers with Unlike Denominators

100

7 3/4 - 1 1/12

6 2/3

200

Pick someone to race... Whomever answers the question correctly, first, wins 200 points for their team! Ready, set, pick..! 

1 1/2 - 3/4= ??

3/4 Congratulations! 

300

17  -  8 2/3

8 1/3

400

7 4/5 - 2 9/10

4 9/10

500

9 1/2 - 5 8/12

3 5/6

Multiplying/dividing Fractions

100

The key difference between adding/subtracting fractions versus multiplying/dividing them is this. 

What is the need for a common denominator?

200

4/7 * 11/12 = ?

What is 44/84 (or 22/42 or 11/21)?

300

Find the missing number.

3/5 * ? = 9/5

What is 3?

400

2 * 9 1/8 -  1/6 = ?

What is 17 23/24?

500

2/3 * 1/4 - 1/6=??

What is 0