Adding and Subtracting Simple Fractions

Adding with Common Denominators

100

1/3 + 1/3

2/3

200

1/16 + 2/16

3/16

300

15/26 + 11/26

26/26= 1

400

2/5 + 2/5

4/5

500

11/24 + 13/24 + 15/24

39/24 = 1 15/24 = 1 5/8

Subtraction with Common Denominators

100

3/3 - 1/3

2/3

200

4/5 - 2/5

2/5

300

13/18 - 6/18

7/18

400

7/7 - 5/7

2/7

500

24/25 - 7/24 - 2/24

15/24 = 5/8

Adding with Uncommon Denominators

100

1/3 + 1/5

8/15

200

6/9 + 3/10

29/30

300

1/3 + 1//9

4/9

400

7/10 + 1/8

33/40

500

2/9 +1/6 +1/3

13/18

Subtracting with Uncommon Denominators

100

3/4 -1/2

1/4

200

5/6 - 3/4

1/12

300

8/9 -2/3

2/9

400

4/20 - 1/3

2/15

500

9/10 - 2/10 - 1/5

1/2

Word Problems

100

Kelly ate 4/8 of a pizza.  Jamie ate 2/8 of that same pizza.  How much of the pizza has been eaten?

6/8 or 3/4 of the pizza.

200

Dave's milkshake recipe calls for 5/6 of a scoop of ice cream and Ruth's recipe calls for 2/6 of a scoop.  How many more scoops of ice cream are used in Dave's recipe than in Ruth's recipe?

3/6 or 1/2 of ice cream

300

Jeff works at a retail company.  He counted 3/5 of the money on Monday.  On Friday he counted 5/25 of the money.  How much of the money did he count in total?

4/5 of the money

400

Issac is allowed to play video games for 5/8 hours in a day.  He has already played for 2/16 hours.  How many hours does he have left?

4/8 or 1/2 hour.

500

Two dogs, Moose and Grover, met in the park.  Moose's tail is 1/3 of a meter long.  Grover's tail is 1/4 of a meter long.  How much longer is Moose's tail than Grover's tail?

1/12 meter longer.