Count by 669 (Skip Counting by 669s)

Count by 669

Here we will show you how to count by 669, discuss counting by 669 patterns, and tell you why knowing how to count by 669 matters. To start off, note that Count by 669 means counting in 669s, or count by six hundred sixty-nines, and it is also called skip counting by 669.

How to count by 669
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 669, we count 669, 1338, 2007, 2676, and so on.

In other words, to count in intervals of 669 or skip counting by 669, we start with 669 and then add 669 to get the next number, and then continue adding 669 to the previous number to keep counting by 669, like this:

669
669 + 669 = 1338
1338 + 669 = 2007
2007 + 669 = 2676
2676 + 669 = 3345
...

You can of course skip count by 669 forever, so it is impossible to make a list of all numbers, but below is a Count by 669 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 669, the second column has the next ten numbers you get when you skip count by 669, and so forth.

Count by 669 Patterns
We organized the Skip Counting by 669s 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 669, but don't have the Counting by 669s Chart above. Obviously, one pattern with counting by 669s is that the number increases by 669.

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 669 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 669.

Why Count by 669?
We think that understanding and learning about skip counting by 669 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.

When you count by six hundred sixty-nine, you are also creating a list of multiples of 669 that you can use in math when you need the least common multiple. 669 times n equals the nth multiple or skip count of 669.

When you skip count by 669, you are also creating a list of numbers that 669 is divisible by. On top of that, skip counting by 669 is the same as making the 669 times table.

Skip Counting
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Count by 670
Here is the next number on our list that we used to skip count.