Transcript Document

To make yummy fruit punch, use 2
cups of grape juice for every 3 cups
of apple juice.
If you already have 12 cups of apple
juice, how many cups of grape juice
will you need to make fruit punch?
In this lesson you will learn to
solve ratio problems by using
a tape diagram.
Let’s Review
3 ways to solve ratio problems
1) Table with addition
+2
+2
+2
Cups of grape juice
2
4
6
8
Cups of apple juice
3
6
9
12
+3
+3
+3
Let’s Review
Let’s
Review
2) Table with multiplication
x4
Cups of grape juice
2
8
Cups of apple juice
3
12
x4
Let’s Review
Let’s
x4
Review
3) Double number lines
cups of
grape juice
cups of
apple juice
0
2
4
6
8
0
3
6
9
12
x4
A Common
Let’s
Review Mistake
Thinking that a ratio describes just
one situation
Example: 2 eggs for every 3 cups of flour
Core
Lesson
Let’s
Review
To make yummy fruit punch, use 2 cups of
grape juice for every 3 cups of apple juice.
If you already have 12 cups of apple juice,
how many cups of grape juice will you need
to make fruit punch?
2x4=8
cups of
2
2
2
2
grape juice
cups of
3
3
3
3
apple juice
3 x 4 = 12
In this lesson you have
learned to solve ratio
problems by using a tape
diagram.
Guided
Practice
Let’s
Review
Soda is on sale: 3 bottles for $4. How much
would it cost to buy 15 bottles of soda? Use
a tape diagram to solve.
Extension
Let’s
Review Activities
Soda is on sale: 2 bottles for $4. How
much would it cost to buy 5 bottles of
soda?
Extension
Let’s
Review Activities
In lemonade, the ratio of lemon juice to
water is 1 to 3. How many cups of lemon
juice will you need if you want to make 10
total cups of lemonade?
Extension
Let’s
Review Activities
In Adam’s class, 2 out of every 5 students
play a sport. If there are 20 students in
the class, how many students play a sport?
Use a tape diagram to solve.
Quick Quiz
Let’s
Review
To make pink paint, you mix 3 gallons of
white paint for every 4 gallons of red
paint. How many gallons of red paint will
you need to mix with 12 gallons of white
paint? Use a tape diagram to solve.
In Ms. Henry’s class, there are 3 girls
for every 2 boys. If there are 12 boys in
the class, how many girls are in the
class? Use a tape diagram to solve.