5 Minute Check
1. David baked 78 cookies for a bake sale. He set aside
12 cookies to share with volunteers. The remaining
cookies are bagged with 3 cookies in each bag. How many
bags does he have?
2. A 3 lb. pork loin can be cut into 10 pork chops of equal
weight. How many ounces are in each pork chop?
3. One of the largest pumpkins ever grown weighed about
¾ ton. About how many pounds did the pumpkin weigh?
4. A 40 foot power boat is for sale by owner. How long is
the boat to the nearest yard?
5 Minute Check
1. David baked 78 cookies for a bake sale. He set aside
12 cookies to share with volunteers. The remaining
cookies are bagged with 3 cookies in each bag. How many
bags does he have?
5 Minute Check
1. David baked 78 cookies for a bake sale. He set aside
12 cookies to share with volunteers. The remaining
cookies are bagged with 3 cookies in each bag. How
many bags does he have?
78 – 12 = 66
66 ÷ 3 = 22 bags
5 Minute Check
2. A 3 lb. pork loin can be cut into 10 pork chops of equal
weight. How many ounces are in each pork chop?
5 Minute Check
2. A 3 lb. pork loin can be cut into 10 pork chops of equal
weight. How many ounces are in each pork chop?
3 lb = 48 ounces
4
48 ounces ÷ 10 = 4 5 ounces
5 Minute Check
3. One of the largest pumpkins ever grown weighed about
¾ ton. About how many pounds did the pumpkin weigh?
5 Minute Check
3. One of the largest pumpkins ever grown weighed about
¾ ton. About how many pounds did the pumpkin weigh?
=
2000
3
6000
1
x 4 = 4 = 1500 lbs
1 ton
2000 lbs
¾ ton
x lbs
5 Minute Check
4. A 40 foot power boat is for sale by owner. How long is
the boat to the nearest yard?
5 Minute Check
4. A 40 foot power boat is for sale by owner. How long is
the boat to the nearest yard?
1 yard
3 feet
=
x yard
40 feet
1
1 x 40 = 40 ÷ 3 = 13 3
Flashcards
Tuesday, Oct 29
Lesson 4.6 and 4.7
Divide Fractions
Divide Fractions
Objective: To understand how to divide a
fraction by a fraction and a whole number by
a fraction.
Divide Fractions
At the end of this lesson you should be able
to answer the following question.
How is the process used to divide fraction
similar to the process used to multiply
fractions?
Divide Fractions
To find the reciprocal of a fraction turn the
fraction upside down.
Example
3 4
Reciprocal of 4 is 3
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:
5
Divide Fractions
What is the reciprocal of:
5
1
5
Divide Fractions
The product of a fraction and it’s reciprocal
will always be what?
Divide Fractions
The product of a fraction and it’s reciprocal
will always be what? 1
Example
5
6
x
6
5
30
= 30
=1
Divide Fractions
To divide a number by a fraction, multiply the
number by the reciprocal of the fraction.
Example
1 1
3
2
÷ =
1
3
2
1
x =
2
3
Divide Fractions
Dividing fractions is as
easy as pie,
Just flip the second
fraction and multiply.
Divide Fractions
Find.
1
4
3
8
÷ =
Divide Fractions
Find.
1
4
3
8
÷ =
1
4
8
3
x =
8
12
=
2
3
Divide Fractions
Find.
5
6
1
3
÷ =
Do this on your own.
Divide Fractions
Find.
5
6
1
3
÷ =
5
6
3
1
x =
15
6
5
2
1
2
= =2
Find.
5
7
Divide Fractions
÷ 10 =
Do this on your own.
Divide Fractions
Find.
5
7
5
7
÷ 10 =
x
1
10
=
5
70
=
1
14
Divide Fractions
Mariska has 2/3 pound of sunflower seeds. Each day she
feeds the cardinals in her yard 1/6 pound of sunflower
seeds. How many days will she be able to feed the
cardinals?
Do this on your own.
Divide Fractions
Mariska has 2/3 pound of sunflower seeds. Each day she
feeds the cardinals in her yard 1/6 pound of sunflower
seeds. How many days will she be able to feed the
cardinals?
2
3
1
6
÷ =
2
3
6
1
x =
12
3
=4
Divide Fractions
Mariska has 2/3 pound of sunflower seeds. Each day she
feeds the cardinals in her yard 1/6 pound of sunflower
seeds. How many days will she be able to feed the
cardinals?
1 pound
2
3
1 day
1 day
1 day
1 day
1 day
1
6
1
6
1
6
1
6
1
6
1 day
1
6
Find.
Divide Fractions
1
3
2÷ =
Do this on your own.
Find.
Divide Fractions
1
3
2÷ =
3
1
2x =2x3=6
Find.
Divide Fractions
2
3
7÷ =
Do this on your own.
Find.
Divide Fractions
2
3
7÷ =
7
1
3
2
x =
21
2
= 10
1
2
Divide Fractions
Jamar has an 8 foot piece of wood he wants to cut to build
a step stool. If each piece is going to be 5/6 of a foot
long, what is the greatest number of pieces he will be able
to use?
Divide Fractions
Jamar has an 8 foot piece of wood he wants to cut to build
a step stool. If each piece is going to be 5/6 of a foot
long, what is the greatest number of pieces he will be able
to use?
5
6
8÷ =
8
1
6
5
x =
48
5
=9
3
5
He will have 9 full size pieces (plus 3/5 of one)
Divide Fractions
At summer camp, the duration of a field hockey game is ¾
of an hour. The camp counselors have set aside 6 hours
for games. How many games can they play?
Do this on your own.
Divide Fractions
At summer camp, the duration of a field hockey game is ¾
of an hour. The camp counselors have set aside 6 hours
for games. How many games can they play?
3
4
6÷ =
6
1
4
3
x =
24
3
=8
Divide Fractions
At summer camp, the duration of a field hockey game is ¾
of an hour. The camp counselors have set aside 6 hours
for games. How many games can they play?
6 hours
¾
¾
¾
¾
¾
¾
¾
¾
Divide Fractions
How is the process used to divide fraction
similar to the process used to multiply
fractions?
Divide Fractions
Agenda Notes
Homework –
Homework Practice 4-6 and 4-7
Due Wednesday, Oct 30
Chapter 4 Test–Friday, Nov 1
After school help session
Thursday, Oct 31 2:15-3PM