comparing and ordering numbers how do we know which number is largest?
TRANSCRIPT
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