Adding and Subtracting with Fractions (4th Grade)

Subtracting Fractions

100

Subtract and simplify. 11/12 - 5/12

What is 1/2?

200

Subtract and simplify 3/5 - 2/5

What is 1/5?

300

Subtract and simplify 8/10 - 4/10

What is 2/5?

400

Mike ran 9/10 of a mile on Monday and 85/100 of a mile on Tuesday.  How much farther did he run on Monday?

What is 5/100?

500

There are 12 colored marbles in a bag: 4/12 of the marbles are green, 3/12 are yellow, and 5/12 are blue. Gabe has already picked 2/12 of the marbles. What fraction of the marbles are left in the bag?

What is 10/12 or 5/6?

Adding and Subtracting Mixed Numbers

100

2 4/10 + 5 5/10=

What is 7 9/10?

200

5 3/4 - 2 1/4?

What is 3 2/4 or 3 1/2?

300

9 2/4 - 6 3/4=

What is 2 3/4?

400

The average weight of a softball is 8 3/8 ounces. The average weight of a baseball is 5 2/8 ounces. How many more does the softball weigh?

What is 3 1/8 ounces?

500

Jon biked 1 5/12 miles from home to the lake, then went 1 3/12 miles around the lake, then back home. How many miles did he bike all together?

What is 2 8/12 miles?

Subtracting tenths and hundredths

100

5/10 - 3/10 =

What is 2/10?

200

50/100 - 25/100 =

What is 25/100 or 1/4?

300

5/10 - 20/100 = 

What is 30/100 or 3/10?

400

9/10 - 10/100 = 

What is 80/100 or 8/10?

500

45/100 - 2/10 =

What is 25/100 or 1/4?

Adding tenths and hundredths

100

1/10 + 3/100 =

What is 13/100

200

4/10 + 20/100=

60/100 or 6/10

300

2/10 + 46/100 =

What is 66/100

400

5/10 + 25/100 + 1/10 =

What is 85/100

500

25/100 + 25/100 + 5/10 =

What is 100/100 or 1 whole