Comparing and Ordering Numbers

How do we know which number is largest?

What is a line?

What is a line?

That’s right! It goes on forever.

That’s why it has those cute little arrows on the ends!

Number Line

A number line is a line. It goes on forever.

Number Line

If that is true,

then what is the first number on a number line?

Number Line

Is it ok to start at 20?

20

Number Line

What about 200?

200

Number Line

What number comes after 200 on a number line?

200

Number Line

What number comes after 200 on a number line?

200 201 202

Number Line

What number comes before 200 on a number line?

200 201 202

Number Line

What number comes before 200 on a number line?

200 201 202199198

AWESOME

You know that a line goes on forever.You know that a number line is the same as a

line!You know that a number line can begin with any

number.You know that the numbers go in order.Do you know everything? Hum…

Number Line

Could a different number come after 200?

Hint: skip count!

200

Number Line

200 220210180160

200 300250150100

200 4003001000

Number Line

Let’s look at some numbers.

Where would you put them on this line?

6000 7000 800050004000

Number Line

4500

6000 7000 800050004000

70016900

5900

Number Line

4500

6000 7000 800050004000

70016900

5900

Number Line

4500

6000 7000 800050004000

7001

6900

5400

Number Line

4500

6000 7000 800050004000

7001

69005400

Number Line

4500

6000 7000 800050004000

700169005400

7001

Greatest to Least

4500

54006900

7001

Greatest to Least

4500

54006900

7001

Greatest to Least

4500

5400 6900

7001

Greatest to Least

4500

54006900

7001

Greatest to Least

4500

54006900

7001

Greatest to Least

4500 5400 6900

That was easy…

Try these numbers:

40,342 40,328 40,302

Hint: Write the numbers, lining up the spaces.

Try these numbers:

40,34240,32840,302

Try these numbers:

40,34240,32840,302

Begin at the left and compare.

Try these numbers:

40,34240,32840,302

Keep

Keep going until the numbers are different.

Try these numbers:

40,34240,32840,302

Keep

Keep going until the numbers are different.

Try these numbers:

40,34240,32840,302

4 > 22 > 0

Try these numbers:

345,382357,908298,384

Work with your neighbors.

Try these numbers:

298,384345,382357,908

Correct order

What about these numbers:

8,398,3848,395,3828,387,9088,485,342