5 Minute Check
Complete on your homework.
1.
2.
2÷
3
5
5÷
5
6
3.
10 ÷
5
6
4.
4÷
5
9
5 Minute Check
Complete in your notebook.
1.
2÷
3
5
5 Minute Check
Complete in your notebook.
1.
2÷
2
1
5
3
3
5
10
3
1
3
x = =3
5 Minute Check
Complete in your notebook.
2.
5÷
5
6
5 Minute Check
Complete in your notebook.
2.
5÷
5
1
6
5
5
6
30
5
x = =6
5 Minute Check
Complete in your notebook.
3.
10 ÷
5
6
5 Minute Check
Complete in your notebook.
3.
10 ÷
10
1
6
5
5
6
60
5
x = = 12
5 Minute Check
Complete in your notebook.
4.
4÷
5
9
5 Minute Check
Complete in your notebook.
4÷
4.
4
1
9
5
5
9
36
5
1
5
x = =7
Turn tour text
Inquiry Lab
Turn tour text
Inquiry Lab
Turn tour text
Inquiry Lab
Inquiry Lab
Inquiry Lab
Step 1
To make a diagram, divide the bar into the number in
the denominator of the first fraction.
Inquiry Lab
Step 1
To make a diagram, divide the bar into the number in
the denominator of the first fraction.
Inquiry Lab
Step 2
Shade the number of sections determined by the
numerator of the first fraction.
Inquiry Lab
Step 2
Shade the number of sections determined by the
numerator of the first fraction.
Inquiry Lab
Step 3
Circle groups a determined by the number in the
numerator of the second fraction.
Inquiry Lab
Step 3
Circle groups a determined by the number in the
numerator of the second fraction.
Inquiry Lab
Make a diagram to find 34 ÷ 38
If the denominators are different, you must make
them the same.
Step 1
To make a diagram, divide the bar into the number in
the denominator of the first fraction.
Inquiry Lab
Make a diagram to find 34 ÷ 38
6
8
Step 1
÷ 38
To make a diagram, divide the bar into the number in
the denominator of the first fraction.
Inquiry Lab
Make a diagram to find 34 ÷ 38
6
8
Step 1
÷ 38
To make a diagram, divide the bar into the number in
the denominator of the first fraction.
Inquiry Lab
Make a diagram to find 34 ÷ 38
6
8
Step 2
÷ 38
Shade the number of sections determined by the
numerator of the first fraction.
Inquiry Lab
Make a diagram to find 34 ÷ 38
6
8
Step 2
÷ 38
Shade the number of sections determined by the
numerator of the first fraction.
Inquiry Lab
Make a diagram to find 34 ÷ 38
6
8
Step 3
÷ 38
Circle groups a determined by the number in the
numerator of the second fraction.
Inquiry Lab
Make a diagram to find 34 ÷ 38
6
8
Step 3
÷ 38
Circle groups a determined by the number in the
numerator of the second fraction.
Inquiry Lab
With a partner read page 314 and complete
pages 315 and 316.
You have until the first bell.
Essential Question
2
A neighborhood garden that is 3 of an acre is
divided into 4 equal size sections. What is the
size of each section?
How would we solve this?
Essential Question
2
A neighborhood garden that is 3 of an acre is
divided into 4 equal size sections. What is the
size of each section?
2
3
?
of an acre
?
?
?
Tuesday, Nov 3
Lesson 4.7a
Divide Fractions
Divide Fractions
Objective: To understand how to divide a
fraction by a fraction.
Divide Fractions
Any two numbers with a product of one are
called what?
Divide Fractions
Any two numbers with a product of one are
called what?
reciprocals.
Divide Fractions
What is the reciprocal of:
1
2
Divide Fractions
What is the reciprocal of:
1
2
2
1
Divide Fractions
What is the reciprocal of:
1
5
Divide Fractions
What is the reciprocal of:
1
5
5
1
Divide Fractions
What is the reciprocal of:
3
7
Divide Fractions
What is the reciprocal of:
3
7
7
3
Divide Fractions
What is the reciprocal of:
45
53
Divide Fractions
What is the reciprocal of:
45
53
53
45
Divide Fractions
To divide by a fraction, multiply by the
reciprocal and simplify.
Divide Fractions
Dividing fractions is as
easy as pie,
Just flip the second
fraction and multiply.
Divide Fractions
Find.
1
2
÷
1
3
Do this on your own.
Divide Fractions
Find.
1
2
1
2
÷
1
3
3
1
3
2
1
2
x = =1
Find.
1
2
Divide Fractions
÷
1
3
We can also show this with a model.
Model the dividend, ½ .
Find.
1
2
Divide Fractions
÷
1
3
We can also show this with a model.
Divide the whole into 3rds .
Divide Fractions
Find.
1
1
2
3
Count the number of 1/3 sections that are in
1/2 .
÷
Divide Fractions
Find.
1
4
÷
3
8
Divide Fractions
Find.
1
4
1
4
÷
3
8
8
3
x =
8
12
=
2
3
Divide Fractions
Find.
2
3
÷
3
8
Divide Fractions
Find.
2
3
2
3
÷
3
8
8
3
16
9
7
9
x = =1
Divide Fractions
Find.
5
6
÷
1
3
Divide Fractions
Find.
5
6
÷
5
2x3
1
3
3
1
5
2
1
2
x = =2
Divide Fractions
Find.
5
7
÷10
Divide Fractions
Find.
5
7
÷10
5
7
1
2x5
x
=
1
14
Divide Fractions
Find.
8
9
÷4
Divide Fractions
Find.
8
9
÷4
2x2x2
3x3
x
1
2x2
=
2
9
Divide Fractions
Megan’s weight is 3 times the weight of her
brother. If Megan weighs 90 lbs, how much
does her brother weigh?
Do this on your own.
Divide Fractions
Megan’s weight is 3 times the weight of her
brother. If Megan weighs 90 lbs, how much
does her brother weigh?
Megan = 3 x brother’s weight
90 = 3 x brother’s weight
3 times what number equals 90?
Divide Fractions
Megan’s weight is 3 times the weight of her
brother. If Megan weighs 90 lbs, how much
does her brother weigh?
Megan = 3 x brother’s weight
90 = 3 x brother’s weight
3 times what number equals 90? 30
Can we set this up as a division problem?
Divide Fractions
Megan’s weight is 3 times the weight of her
brother. If Megan weighs 90 lbs, how much
does her brother weigh?
Megan = 3 x brother’s weight
90 = 3 x brother’s weight
3 times what number equals 90? 30
Can we set this up as a division problem?
90 ÷ 3= brother’s weight
Divide Fractions
A rectangular sign has an area of 6 square
feet. If the width is 2 feet, what is the length?
Do this on your own.
Remember ; width x length = area
Divide Fractions
A rectangular sign has an area of 6 square
feet. If the width is 2 feet, what is the length?
2 x ? = 6, so ? = 3
Can we write this is a division problem?
Divide Fractions
A rectangular sign has an area of 6 square
feet. If the width is 2 feet, what is the length?
2x?=6
Can we write this is a division problem?
6 ÷ 2 = 3 feet
Area ÷ width = length
Divide Fractions
7
A rectangular sign has an area of 10 square
3
feet. If the width is 4 feet, what is the length?
Do this on your own.
Divide Fractions
7
A rectangular sign has an area of 10 square
3
feet. If the width is 4 feet, what is the length?
7
10
7
10
÷
3
4
4
3
x =
28
30
=
14
15
feet
Divide Fractions
Find two positive fractions with a quotient of
5/6.
Do this on your own.
Divide Fractions
Find two positive fractions with a quotient of
5/6.
Sample answer:
÷
1
2x
1
2
3
5
5
3
=
5
6
Essential Question
2
A neighborhood garden that is 3 of an acre is
divided into 4 equal size sections. What is the
size of each section?
Do this on your own.
Essential Question
2
A neighborhood garden that is 3 of an acre is
divided into 4 equal size sections. What is the
size of each section?
÷4
2
1
1
3 x 2x2 = 6 acre
2
3
Divide Fractions
Agenda Notes
Homework –
Homework Practice 4.7.a
Due Wednesday, Nov 4
Mid-CH 4 ReQuiz
Thurs, Nov 5 - Afterschool
Chapter 4 Test -Tuesday, Nov 10
Accum Rev 4 due Nov 10