Transcript Dividing Decimals

Dividing Decimals and
Fractions
Created by: Mrs. J Couch
Dividing Decimals
Dividing Decimals
Practice
Solve:
Practice
The school put up a sign to advertise a car wash in the
school parking lot to raise money for library books. One
hundred fifty two people signed up to have a car washed
on Saturday. If one student can wash 25 cars in a day,
how many students will have to work on Saturday in order
to finish the job?
Practice
Sharon’s soccer team won the tournament last weekend.
Her mom brought chicken nuggets for the team’s
celebration. There are 16 members of the team, and the
restaurant put 137 nuggets on the tray. How many
nuggets will each player get to eat?
Dividing Fractions
-Put fractions in ‘fraction form’
(improper fraction) and KCF (keep,
change, flip (reciprocal))
-This work because multiplying by a
number and dividing by its
reciprocal is the same thing.
Practice
Solve:
 Drawing pictures or diagrams (tape
diagrams) can help solve word problems.
 Tape diagram. A drawing that looks like a
segment of tape, used to illustrate
number relationships. Also known as a
strip diagram, bar model, fraction strip, or
length model.
Example
In preparing to make hair bows for friends, Samantha
realizes she needs 2/3 yard of ribbon for each bow. She
has 2 yards of ribbon. Does she have enough ribbon for
four bows?
1 yd
2 yds
Answer: Samantha will not have enough ribbon to make four bows. She
only has enough to make three bows.
Example
Michael’s mom paid $2.40 for a ¾ pound box of cereal.
How much is that per pound?
$0.80
$0.80
$0.80
How much would the whole pound cost?
Answer: The cereal will cost $3.20 per pound.
$0.80
$0.80 x 4 = $3.20
Practice Drawing a Model
It’s your birthday and you are going to have a party. From
the grocery store you get 6 pints of ice cream. If you serve
¾ of a pint of ice cream to each of your guests, how many
guests can be served?
Practice Drawing a Model
Sam is a landscaper. He found that he had 2 ¼ gallons
of liquid fertilizer concentrate. It takes ¾ gallon to make
a tank of mixed fertilizer. How many tankfuls can he mix?
Practice
Kaylie used 10.5 yards of ribbon to make bows for the
dance. If each bow required 0.75 yards of ribbon, how
many bows did she make?
Practice
The quarterback threw the football 36 ½ yards over 4
plays. How many yards did the quarterback average per
play?
Practice
Elliott is cutting a roll of cookie dough into pieces that are
¼ inch thick. If the roll of cookie dough is 5 ½ inches
long, which model below best represents the situation?
Notecard
-Solve the following problem on the notecard.
-Draw a model to help you solve.
-Remember to answer in a complete sentence.
Ellen has ten pounds of coffee. She wants
to repackage the coffee into bags of size
2/3 pound. How many bags of coffee can
she make?