x 10 or more
What's the rule for multiplying a number x10
What is the formula for finding the area of a rectangle?
HEIGHT x LENGTH = AREA
What's the rule for multiplying a number x100
Staple on TWO ZEROS!
If a rectangle is 5cms high and 10cms long, what's the area?
5 x 10 = 50cms
What's the rule for multiplying by 1,000?
Staple on THREE ZEROS!
If a rectangle has an area of 100cms and the length is 10, what's the width?
? x 10 = 100
10 x 10 = 100
The missing dimension is 10cms
What's the rule for multiplying by 10,000?
Staple on FOUR ZEROS!
Name two models we use for multiplying large numbers.
Area Model
What is happening to each number as you multiply by 10, 100, 1,000 or 10,000?
They are changing place value! For example,
1 x 10 = 10.
The 1 has moved to the 10 place!
How can an area model help you solve this division problem;
I have 240 oreos and want to share them between 4 lucky Poppy students. How many oreos will each Poppy student receive?
4 x ? = 240
The dimensions of the rectangle are 4, ? and the area is 240.
So, 4 x ? = 240
4 x 60 = 240