### Multiplication

Standards:
CCSS.Math.Content.5.NBT.B.5 Fluently multiply multi-digit whole numbers using the standard algorithm.

In fifth grade, students learn to use and apply the standard or traditional algorithm for multiplication. To learn this students move from place value to multiplication by powers of ten and decimal fractions to review of the area model and partial product then learning and practice of the standard algorithm. These Learn Zillion lessons are helpful when teaching this unit. Note that Learn Zillion is a free resource, but teachers and families need to make an account to use it.

Learning Expectations
• Estimate products
• Powers of 10
• Interpret the # number of times one number is compared to another.
• Solve 2 X 3, and 3 X4 multiplication equations.
• Problem Solving
Practice:

#### Partial Product Problem Solving: How Old Are You?

posted Dec 13, 2011, 3:43 AM by Maureen Devlin

 Name:  ____________________________________________________How old are you?1. Approximately how many days old are you?  (multiply your age in years by the days in a year (365)?Answer:  I am approximately ____________ days old..2.  Approximately how many hours old are you?  (Multiply how old you are in days X 24 (# of hours in a day).Answer:  I am approximately ________ hours old?.3.  Approximately how many minutes old are you?  (Multiply your age in hours times 60 (the number of minutes in an hour).Answer:  I am approximately __________ minutes old..4.  Approximately how many seconds old are you?  (Multiplly your age in minutes times the number of seconds in a minute: 60)Answer:  I am approximately _________ seconds old.

#### Multiplication Partial Product and Problem Solving (digits: 2X2, 2X3)

posted Dec 7, 2011, 1:22 AM by Maureen Devlin

Name: _____________________________________________________

Partial Product Multiplication Homework: Due 12/12
If you forget how to complete partial product multiplication, please watch this video:http://youtu.be/leykN5g6kj8
 Exact Estimate 53 X 75 73 X 55

.
 Exact Estimate 63 X 85 97 X 34 85 X 48

 Exact Estimate 79 X 48 37 X 65 83 X 97

 Exact Estimate 231 X 65 834 X 98

.
Wednesday
 Exact Estimate 723 X 46 835 X 58

.
 Exact Estimate 977 X 24 863 X 33

.
Name: _____________________________________________________

Classroom Practice
 Exact Estimate 54 X 72 96 X 67 16 X 27

.
 Exact Estimate 83 X 35 47 X 84 75 X 88

 Exact Estimate 39 X 78 97 X 35 43 X 77

 Exact Estimate 721 X 67 83 X 985

.
Wednesday
 Exact Estimate 72 X 246 83 X 658

.
 Exact Estimate 97 X 234 86 X 534

Name:  ____________________________________
Problem Solving with Large Number Multiplication

Underline key words.  Show your work.  Write your answer as a sentence. We will review this together.

1. Tickets to the Patriots Game cost \$238. each.  Marcia wanted to buy her family tickets for the holidays.  She bought 12 tickets.  How much did she spend altogether?

_______________________________________________________________________

.
2.  Jill ran 27 miles each week.  How many miles did she run in a year? (remember there are 52 weeks in a year).

3.  Paul wrote 125 pages in his journal each month.  How many pages did he write in a year? (Remember there are 12 months in a year.)

.
4.  Maria made jumpropes for her class.  She used 48 inches of rope for each jump rope.  There are twenty-five children in her class.  How many feet of rope did she need to make all the jump ropes?  (Remember 12 inches equals one foot).

.
5.  Peter made \$654. a month as a pizza delivery man.  How much did he make in a year?  (Remember there are 12 months in a year).

6.  Louise read approximately 55 pages an hour.  She read for two hours every day of the year  Approximately how many pages did Louise read each year?  (Remember there are 365 days in a year).

7.  Write your own word problem that requires two-digit by three-digit multiplication to solve.  Solve the problem below.

Word Problem:  __________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

.
Name: _____________________________________________________

Bonus: Multiplication with Decimals.  Complete all or some of the problems using any algorithm you know for multiplication.
 Exact Estimate A.  \$53.82  X 75 B.  \$73.62 X 55

.
 Exact Estimate C.  \$63.25 X 85 D. \$97.34 X 34 E. \$85.14 X 48

.
Write a word problem that matches bonus problems in the packet.
 A.

 B.

 C.

 D.

 E.

.
Math Quiz: 12/12

Name:  _________________________________________________________________

Estimate and find the exact product for the multiplication problems below using the partial product algorithm.

 Exact Product Estimated Product 1. 7 X 83 2. 56 X 23 C.  74 X 123 D. 123 X 56

.
Bonus

 E. 23 X \$45.67 F.  34 X \$45.67

#### Multiplication Practice Partial Product (digits: 2X1, 3X1)

posted Nov 30, 2011, 11:18 PM by Maureen Devlin   [ updated Dec 7, 2011, 1:20 AM ]

Monday Night            Name: _____________________________________________________
Please use partial product multiplication to solve Tuesday-Thursday night homework.  Watch this video to understand partial product multiplication well: http://www.youtube.com/watch?v=leykN5g6kj8&feature=related
 Exact Exact 10 X 5 5 X 100 7 X 10 8 X 1,000 9 X 100 6 X 10

.
 Exact Exact 10 X 50 5 0X 200 70 X 30 8 00 X 3,000 9 0 X 400 600  X 80

 Exact Exact 20 X 5 5 X 300 7 X 40 8 X 8,000 9 X 500 6 X 60

Tuesday
 Exact Estimate 7 X 67 8 X 98 7 X 57 *

.
Wednesday
 Exact Estimate 7 X 235 8 X 687 5 X 803

.
Thursday
 Exact Estimate 9 X 234 8 X 458 4 X 709 *

Problem Solving

Emily wanted to give every girl in her Girl Scout troup a bag of stickers.  Each bag contained 126 stickers.  There were 8 girls in her troup. How many stickers did Emily need altogether.  Show your work when solving this problem.

Problem Solving:  Write your own word problem that requires 1 digit by 3 digit multiplication.  Then solve the problem.

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

#### Bonus: Multiplying with the Powers of 10

posted Nov 30, 2011, 11:01 PM by Maureen Devlin