5th Grade Bridges Unit 2

Adding Fractions

100

1/6 + 2 1/4

2 5/12

200

5/6 + 1/3

7/6 or 1 1/6

300

4/12 + 5/6

14/12 or 1 2/12 or 1 1/6

400

 1/2 + 1/3 = ? + ? =  sum

*Hint: the question marks are equivalent fractions with the same denominator.

3/6 + 2/6 = 5/6

500

3 4/15 + 2 1/3

5 9/15 or 5 3/5

Subtracting Fractions

100

5/6 -1/3=

3/6 or 1/2

200

1 1/5 - 3/10=

9/10

300

1/2 - 1/3 =

1/6

400

 3/5 - 4/10 = ? - ? =  difference

*Hint: the question marks are equivalent fractions with the same denominator. 

6/10 - 4/10 = 2/10 or 1/5

500

 10/16 - 5/8 = ? - ? = difference

*Hint: the question marks are equivalent fractions with the same denominator. 

10/16 - 10/16 = 0/16 or 0

Story Problems

100

Shawn made a mix of plants.  The mix has  1/2  cup green seeds,  2 2/3  cup red seeds, and  1 1/4  cup bronze seeds.  How many cups of seeds does Shawn Plant?

Shawn needs to plant  

4 5/12

      cups of seeds. 

200

Abby is  5 1/2  feet tall.  Craig is  5 1/3  feet tall.  How much taller is Abby than Craig?

Abby is

1/6

  of a foot taller or 2 inches. 

300

David ran  1/2  a mile down at the high school track and then walked

1/3

 of  a mile.  

-When Sara solved it she got

2/5

 of a mile.  Is this reasonable?  WHY

No.  She added

1/2 + 1/3

 straight across instead of finding the common denominator.

400

David ran  1/2  a mile down at the high school track and then walked  1/3  of  a mile. How far did David go?

David went  

5/6

of a mile.

500

Andrea walked  2/5  of the trail and then ran  1/4  of the trail.  How much of the trail did she cover? Did Andrea walk or run father? How much farther did she walk than run?

Andrea covered

13/20

of a mile. She walked further by 

3/20

 of a mile. 

Better Buy

100

Which is the better buy? 

4 cans for $3 OR 8 cans for $6

They are the same buy. 

200

Which is the better buy?  

5 cans for $6 OR 8 cans for $10

5 cans for $6

5 cans/6$ = 40 cans for $48

8 cans/10$ = 40 cans for $50

300

Which is the better buy?  

12 cans for $15 OR 15 cans for $18

15 cans for $18 is the better buy

12 cans $15=60 cans $75 = 1 can $1.25

15 cans $18 = 60 cans $72 = 1 can $1.20

400

If 5 pounds of apples cost $8.  How much would 9 pounds cost?

9 pounds cost $14.40 (each pound cost $1.60)

500

If 5 pounds of apples cost $8.  How much would 11 pounds cost?

11 pounds cost $17. 60

All

100

Mark drove  3/4  of a 36 km trip before he stopped to get gas for his car. How many kilometers had Mark driven at this point?

Mark had driven 27 kilometers. 

200

 1/3 of 27

9

300

 2/3 of 18

12

400

 1/12 of 60

5

500

 5/12  of 72

30