Chapter 9 Jeopardy

LCD

100

What is the least common denominator of 1/4 and 1/6?

12

200

Find the LCD of 3/5 and 2/10.

10

300

What is the LCD of 7/8 and 3/4?

8

400

Find the LCD of 5/6 and 1/9.

18

500

What is the least common denominator of 2/3, 1/4, and 5/6?

12

Addition with Unlike Denominators

100

1/4 + 1/2 =

3/4

200

2/3 + 1/6 =

5/6

300

3/5 + 1/3=

14/15

400

2/5 + 3/7=

29/35

500

3/10 + 1/6=

14/30 or 7/15

Subtraction with Unlike Denominators

100

1/2- 3/8=

1/8

200

4/9- 1/6=

5/18

300

9/10- 1/4=

13/20

400

5/7- 2/3=

1/21

500

11/12- 7/15

27/60 or 9/20

Estimate Using Benchmarks

100

5/8-1/5=

1/2

200

1/6 + 3/8=

1/2

300

11/12+6/10=

1 1/2

400

6/7 + 2 and 4/5 =

4

500

2 and 7/8 - 2/5

2 and 1/2

Word Problems

100

Pia has 9/10 meter of ribbon. She cuts off 3/5 meter of the ribbon to use as a bow. How much ribbon does Pia have left?

3/10 meter

200

Hector bought 1/4 pound of screws and 2/5 pound of nails to build a skateboard ramp. What is the total weight of the screws and nails?

13/20 pound

300

Lyle bought 3/8 pound of red grapes and 5/12 pound of green grapes. How many pounds of grapes did he buy?

19/24 pound

400

Anton uses 2/3 cups of grapes and 1/2 cup of strawberries. What is the total amount of fruit Anton used?

7/6 or 1 1/6 cups

500

To make a ribbon and bow for a hat, Stacey needs 5/6 yard of black ribbon and 2/3 yard of red ribbon. How much total ribbon does she need?

9/6 or 1 1/2 yards