Here we will show you how to count by 66, discuss counting by 66 patterns, and tell you why knowing how to count by 66 matters. To start off, note that Count by 66 means counting in 66s, or count by sixty-sixes, and it is also called skip counting by 66.
How to count by 66
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 66, we count 66, 132, 198, 264, and so on.
In other words, to count in intervals of 66 or skip counting by 66, we start with 66 and then add 66 to get the next number, and then continue adding 66 to the previous number to keep counting by 66, like this:
66
66 + 66 = 132
132 + 66 = 198
198 + 66 = 264
264 + 66 = 330
...
You can of course skip count by 66 forever, so it is impossible to make a list of all numbers, but below is a Count by 66 Chart of the first 100 numbers to get you started.
![Skip Counting by 66 Count by 66 chart](https://adding.info/image/skip-counting-charts/count-by-66-chart.png)
Looking at the chart above, you will see that the first column has the first ten numbers you get when you skip count by 66, the second column has the next ten numbers you get when you skip count by 66, and so forth.
Count by 66 Patterns
We organized the Skip Counting by 66s 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 66, but don't have the Counting by 66s Chart above. Obviously, one pattern with counting by 66s is that the number increases by 66.
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 5 over and over. The pattern of the last digit when you count by 66 goes 6, 2, 8, 4, 0 and 6, 2, 8, 4, 0 and so on for as long as you count by 66.
Why Count by 66?
We think that understanding and learning about skip counting by 66 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.
When you count by sixty-six, you are also creating a list of multiples of 66 that you can use in math when you need the least common multiple. 66 times n equals the nth multiple or skip count of 66.
When you skip count by 66, you are also creating a list of numbers that 66 is divisible by. On top of that, skip counting by 66 is the same as making the 66 times table.
Skip Counting
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Count by 67
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