How to represent numbers using “quick

hundreds” “quick tens” and “quick ones”

Unit 3 Math Expressions

Place value is where a digit is placed in a whole number. Each digit has a specific “value” or amount depending on where the

digit is (ones’ place, tens’ place, hundreds’ place).

Numbers, such as 84, have two digits.  Each digit is a different

place value. The left digit is the tens' place.  It tells you that there are 8 tens.

The last or right digit is the ones' place which is 4 in this example.  Therefore, there are 8 sets of 10,

plus 4 ones in the number 84.    8 4      

tens' place ones' place

Another example…

65 “6” is in the tens’ place. “5” is in the ones’

place.

Let’s see a bigger number…

142“1” is in the hundreds’ place. “4” is in the tens’ place. “2” is in the

ones’ place.

How could you draw different numbers with pictures?

If your teacher asked you to draw the number 143- would you want to draw 143 different objects? That

would take a long time! There is an easier way to do this.

How many circles do you see?

ONE!

Each circle stands for one of something

How many circles do you see now?

10How can we show the number ten without

drawing 10 circles?

A ten can be shown with a simple line.

Here are 100

Circles. How can Idraw the number 100 without having to draw 100 of something?There are 10 groups of 10.

We can draw a box around the 100

circles.

Let’s show the number 65…

Let’s show the number 142…

100 + 40 + 2

Your turn…

You will need to decide how to best say or draw the number that is shown…

? ? ?