Transcript Document

How do you use equivalent fractions to
add fractions and mixed numbers with
unlike denominators?
1
3
For example, what is
+
?
3
4
In this lesson you will learn
how to use equivalent
fractions to add unlike
fractions and mixed numbers
by using a number line.
Let’s
Review
Let’s
Review
+
=
3
10
+
4
7
=
10
10
3
10
4
10
0
1
0
1
7
10
0
1
A Common
Let’s
Review Mistake
3
10
+
4
7
=
10
20
CoreReview
Lesson
Let’s
1 3
What is + ?
3 4
0
1
0
1
CoreReview
Lesson
Let’s
1
3
1
4
=
3 12
1 3
What is + ?
3 4
3 9
=
4 12
3
4
13
1
=1
12
12
In this lesson you have
learned how to use equivalent
fractions to add unlike
fractions and mixed numbers
by using a number line.
Guided
Practice
Let’s
Review
+
1
21
3 =
2
6
1
2
=
3
6
23
5
or 3
6
6
1
1
Add 3 and
2
3
0
1
0
1
0
1
2
3
4
2
3
4
Extension
Let’s
ReviewActivities
Create an addition fraction problem using
mixed numbers. Solve the problem and model
your answer using number lines.
Create an addition fraction problem using
mixed numbers. Solve the problem and model
your answer using fraction bars and number
lines.
Write out your reasoning for your solutions.
Quick Quiz
Let’s
Review
3
2
Add 2
+
3
5
1
3
Add 1
+ 2
2
4