Count by 909 (Skip Counting by 909s)

Count by 909

Here we will show you how to count by 909, discuss counting by 909 patterns, and tell you why knowing how to count by 909 matters. To start off, note that Count by 909 means counting in 909s, or count by nine hundred nines, and it is also called skip counting by 909.

How to count by 909
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 909, we count 909, 1818, 2727, 3636, and so on.

In other words, to count in intervals of 909 or skip counting by 909, we start with 909 and then add 909 to get the next number, and then continue adding 909 to the previous number to keep counting by 909, like this:

909
909 + 909 = 1818
1818 + 909 = 2727
2727 + 909 = 3636
3636 + 909 = 4545
...

You can of course skip count by 909 forever, so it is impossible to make a list of all numbers, but below is a Count by 909 Chart of the first 100 numbers to get you started.

Looking at the chart above, you will see that the first column has the first ten numbers you get when you skip count by 909, the second column has the next ten numbers you get when you skip count by 909, and so forth.

Count by 909 Patterns
We organized the Skip Counting by 909s Chart above in 10 rows and 10 columns so you can easily identify patterns.

Skip counting always creates patterns. Figuring out these patterns may help you if want to count by 909, but don't have the Counting by 909s Chart above. Obviously, one pattern with counting by 909s is that the number increases by 909.

Furthermore, if you look at each row above, each number in the row has the same last digit (ones place). That means that every tenth number has the same last digit.

If you look down the columns, you will see that the last digit (ones place) repeats itself in blocks of 10 over and over. The pattern of the last digit when you count by 909 goes 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 and 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 and so on for as long as you count by 909.

Why Count by 909?
We think that understanding and learning about skip counting by 909 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.

When you count by nine hundred nine, you are also creating a list of multiples of 909 that you can use in math when you need the least common multiple. 909 times n equals the nth multiple or skip count of 909.

When you skip count by 909, you are also creating a list of numbers that 909 is divisible by. On top of that, skip counting by 909 is the same as making the 909 times table.

Skip Counting
Need to skip count by another number? Enter another number for us to skip count for you.

Count by 910
Here is the next number on our list that we used to skip count.