Subtract fractions

Lesson 20 Session 3: Subtracting Fractions

I can subtract fractions with like denominators.

I can solve word problems where I will need to subtract fractions with like denominators.

Fill in the Blanks

Review: What is 1/10 more than 5/10?

Draw

Review: What is 1/10 less than 5/10?

Read and try to solve the problem

Ally's water bottle has 7/8 liters of water in it. During her work out Ally drinks 4/8 liters of water. How much water is left in Ally's water bottle?

Pair and Share

Ally's water bottle has 7/8 liters of water in it. During her work out Ally drinks 4/8 liters of water. How much water is left in Ally's water bottle?

Match

Match the following differences

• 8/9 - 4/9 =

• 2/3 - 1/3 =

• 4/10 - 1/10 =

• 8/10 - 7/10 =

• 4/5 - 4/5 =

4/9

1/3

3/10

1/10

0/5

• 4/9

• 1/3

• 3/10

• 1/10

• 0/5

Fill in the Blanks

Landon has 8/10 of his lawn left to mow. He mows 6/10 of the lawn before breaking for breakfast. How much more of the lawn does Landon have left to mow?

Fill in the Blanks

Kirk has 3/4 of a carton of eggs. He uses some of the eggs to make an omelette and now has 2/4 of the carton left. What fraction of the carton did Kirk use?

Poll

How confident are you in your ability to add or subtract fractions with like denominators?

• 4

• 3

• 2

• 1