Multiplying By
Multiples of 10
© 2012 Elizabeth Hill
What are we
learning?
Our Standard
Says
Students will further develop their
understanding of multiplication of whole
numbers and develop the ability to apply it in
problem solving by understanding the effect
on the product when multiplying by
multiples10.
© 2012 Elizabeth Hill
What are we
learning?
I can correctly multiply a
number by 10’s and 100’s
numbers.
© 2012 Elizabeth Hill
A 5rd Grader’s Best Friend
Factors
Theseare
arethe
These
are
called you
numbers
products!
factors!
are
multiplying.
© 2012 Elizabeth Hill
© 2012 Elizabeth Hill
What are mulitples of 10?
The multiplies of 10 are the numbers
you get when counting by 10.
© 2012 Elizabeth Hill
30 x 6=
400 x 7=
50 x 3=
800 x 4=
To be able to multiply by
multiples of 10, you have
to know your basic facts.
© 2012 Elizabeth Hill
Introducing…
Zero the Hero
© 2012 Elizabeth Hill
Zero the Hero
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
To the basic fact,
And you will get the answer,
Just like THAT!
© 2012 Elizabeth Hill
How can Zero the Hero
help you?
30
1
Zero
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X4
12 0
To the basic fact,
And you will get the answer,
Just like THAT!
30 X 4=120
© 2012 Elizabeth Hill
How can Zero the Hero
help you?
50
1
Zero
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X6
30 0
To the basic fact,
And you will get the answer,
Just like THAT!
50 X 6=300
© 2012 Elizabeth Hill
How can Zero the Hero
help you?
70
1
Zero
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X3
21 0
To the basic fact,
And you will get the answer,
Just like THAT!
70 X 3=210
© 2012 Elizabeth Hill
How can Zero the Hero
help you?
90
1
Zero
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X8
72 0
To the basic fact,
And you will get the answer,
Just like THAT!
90 X 8=720
© 2012 Elizabeth Hill
How can Zero the Hero
help you?
60
1
Zero
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X7
420
To the basic fact,
And you will get the answer,
Just like THAT!
60 X 7=420
© 2012 Elizabeth Hill
Try These With Your Partner
40
20
50
X8
X5
X9
60
90
40
X3
X7
X5
© 2012 Elizabeth Hill
Time for a Challenge
300
2
Zeros
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X4
12 00
To the basic fact,
And you will get the answer,
Just like THAT!
300 X 4=1,200
© 2012 Elizabeth Hill
Time for a Challenge
500
2
Zeros
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X8
40 00
To the basic fact,
And you will get the answer,
Just like THAT!
500 X 8=4,000
© 2012 Elizabeth Hill
Time for a Challenge
900
2
Zeros
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X6
54 00
To the basic fact,
And you will get the answer,
Just like THAT!
900 X 6=5,400
© 2012 Elizabeth Hill
Tricky, Tricky
3
Zeros
7000
Zero is the hero.
He just won’t stop!
All you do is count him,
At the top!
You add those zeros,
X 6
42 000
To the basic fact,
And you will get the answer,
Just like THAT!
7000 X 6=42,000
© 2012 Elizabeth Hill
Test Practice
There are 50 chips in a bag. If David
buys 7 bags of chips, how many chips
will he have?
a.
b.
c.
d.
35
350
300
120
© 2012 Elizabeth Hill
Test Practice
If 9 x 7 is 63, then what is 900 x 7?
a.
b.
c.
d.
63
630
6300
1600
© 2012 Elizabeth Hill
Test Practice
When baking chocolate chip cookies, Mrs.
Hill wanted to put 20 chocolate chips in
each cookie. If she bakes 30 cookies, how
many total chocolate chips will she need?
a.
b.
c.
d.
50
60
600
500
© 2012 Elizabeth Hill