Transcript Multiplying Fractions using a Tape Diagram

Goal
I will solve word problems
using a tape diagram and
fraction by fraction
multiplication
Agenda
 Fluency
 Multiply Fractions
 Multiply whole numbers by decimals
 Whole class
 Problem set
 Exit ticket
Fluency: Multiply Fractions
1/3 of 2/5
2/3 of 2/5
3/5 of 2/3
3/5 x 3/4
Fluency: Multiply Whole
Numbers by Decimals
 3 x ______ = 3/10
 7 x .1 = _______
 7 x .01= _______
 9 x .1= _______
 80 x .01 = _______
 15 x 1/10= _______
Anthony bought an 8 foot
board. He cut off ¾ of the
board to build a shelf, and gave
1/3 of the rest to his brother for
an art project. How many
inches long was the piece
Anthony gave to his brother?
Mrs. Jones made 60 cookies for
a bake sale. She sold 2/3 of
them and gave ¾ of the
remaining cookies to the
students working at the sale.
How many cookies does she
have left?
Answer
3 units= 60
I unit= 60/3= 20
20/4= 5
___________________________60______________________________
Sold
Sold
_________20_____
¼ x 1/3 = 1/12
1/12 x 60 = 60/12= 5
Lukas spent 1/3 of his
money on a burrito and a
water. The burrito cost 2
times as much as the water.
The burrito cost $4, how
much money does Lukas have
left?
Answer
Burrito and Water
B
B
_______$4_____
W
2 units = 4
1 unit = 4/2
3 units= 6
2x6= 12
Dean is sorting his rock collection.
2/3 of the rocks are metamorphic
and ¾ of the remainder are igneous
rocks. If the 3 rocks left over are
sedimentary, how many rocks does
Dean have?
Problem Set
 You will have ______ minutes to complete the problem
set. You are to work alone.
 I will be calling students to the back table.
 If you are willing to help please move your number on
the board
 Those that get stuck may ask one of these people for
help.
Exit Ticket
You will have three minutes to
solve the exit ticket. Please draw
a tape diagram and circle your
final answer.
What did we learn?