Subtracting
Fractions
Fractions
+ and -
Mixed Numbers
Comparing
Fractions
Decomposing
Fractions
100

7/12 - 3/12

4/12

100

2/5 + 1/5 = ?

3/5

100

24 1/4 - 20.

4 1/4.

100

What is larger: 1/3 or 1/2?

1/2

100

Decompose 3/4.

Answers may vary (Must equal 3/4).

200

Draw an area model to find 7/10 - 3/10.

Drawings must equal 4/10.

200

2/10 + 6/10 + 1/10 = ?

9/10

200

1 4/6 + 2 5/6

4 3/6

200

Compare 6/8 to 3/4

They are equal!

200

Decompose 5/6 into three fractions.

Answers may vary (must equal 5/6).

300

Mr. Yetkin uses 4/6 of a sheet of plywood to board up a window. How much of the plywood is left?

2/6 plywood

300

Lindsay had 5/10 cup of flour in the mixing bowl. She added 2/10 cup of cocoa powder and 3/10 cup of sugar. What is the amount of dry ingredients in the mixing bowl?

1 cup

300

Julie has two extension cords with lengths of 22 2/4 feet and 26 3/4 feet. How long a cord can she make by attaching them together?

49 1/4 feet.

300

Draw a model to show that 2/3=4/6

300

Explain why you rewrite 4 1/4 to find

4 1/4 - 3/4.

Since 1/4 is less than 3/4, you must decompose 4  1/4 and rename it as 3 5/4.

400

Cole spent some time working on his history homework. Then, he spent 5/12 hours working on his Spanish homework. Cole spent 1 hour on homework. What fraction of an hour did Cole spend on history? Explain.

7/12 hour; because 12/12 - 5/12 = 7/12

400

3/10 of Ken's buttons are blue, 4/10 are green, and the rest are black. What fraction of Ken's buttons are black?

3/10

400

Jack made 5 1/4 dozen cookies for the bake sale, and his sister made 3 3/4 dozen cookies. How many more dozen cookies did Jack make than his sister?

400

Write two fractions that are equivalent to 8/10. Describe how you can show they are equivalent.

4/5 and 16/20; I can create a visual model to see if the same amount is shaded for each fraction.

400

Solve 5 1/3 minus 2/3.

4 2/3.

500

Using only odd numbers for numerators, write two different subtraction problems that have a difference of 1/2. Remember you can find equivalent fractions for 1/2.

Answers will vary (must have 1/2 as the answer to both problems).

500

How can you add 3/10 and 2/5? Solve and explain.

Sample; I can write 2/5 as the equivalent fraction 4/10. Then the two fractions will have like denominators, and they can be added to get 7/10.

500

A golf ball measures about 1 4/6 inches across the center. A tennis ball measures about 2 3/6 inches across the center. What is the difference between the distances across the centers of a tennis ball and a golf ball?

5/6 inches

500

Order 4/5, 1/4, 6/8, and 5/9 from least to greatest.

1/4, 5/9, 6/8, 4/5

500

Turn 16/5 into a mixed number.

3 1/5