Adding and subtracting fractions recap

Adding and Subtracting Fractions

This week we have been adding and subtracting like fractions. We are going to go over how to add and subtract, but first lets review some key words.

The next few slides are going to be multiple choice questions - read carefully and be ready to answer

Multiple Choice

Which number is the denominator for the fraction 5/6

• 5

• /

• 6

Multiple Choice

Which number is the numerator of the fraction 5/6

• 5

• /

• 6

Multiple Select

What does "like fractions" mean?

• they like each other

• they have the same numerator

• they have the same denominator

• they have the bottom number in common

​When adding fractions there are a few steps we need to do - on the next slide you are going to put these steps in the right order - are you ready?

Reorder

Reorder the following

• Check the denominator - are they like fractions?

• Keep the denominator the same

• add the numerators

1

2

3

• 1
• 2
• 3

​Adding fractions steps:

​1) Check the denominators - are they like fractions (is the bottom the same number)
2) Keep the denominator the same
3) Add the numerators

​Remember these steps - now we are going to solve some problems

Multiple Choice

• 3/8
• 3/16
• 1/8
• 2/8

Multiple Choice

• 3/8
• 3/16
• 1/8
• 2/8

Multiple Choice

• 4/5
• 4/10
• 2/5
• 5

Multiple Choice

CHALLENGE:

1/10 + 3/10 + 4/10 =

• 10/10
• 10/8
• 7/10
• 8/10

Multiple Choice

CHALLENGE:

Kayla has 3/9 of a pizza and Lille gave her 2/9 of a pizza. How much pizza does Kayla have now?

• 5

• 5/9

• 1/9

• 6/9

​Subtracting Like Fractions

Subtracting like fractions is very similar to adding like fractions - let's see if you can remember all of the steps

Fill in the Blanks

1) Check if you have like fractions

2) Keep the denominator the (BLANK)

3) Subtract the numerators

​Subtracting like fractions steps:

​1) Check the denominators - are they like fractions (is the bottom the same number)
2) Keep the denominator the same
3) Subtract the numerators

​Remember these steps - now we are going to solve some problems

Multiple Choice

• 3/10
• 3/5
• 3/25
• 15/5

Multiple Choice

What is the answer?

Multiple Choice

• 1/6
• 1
• 1/0
• 1/12

Multiple Choice

CHALLENGE:

There are 8 slices of pizza. Tim ate 4 slices of pizza. How many slices of pizza are left after Tim eats 4 slices?

Open Ended

How do you feel about adding and subtracting fractions?