Count by 821 (Skip Counting by 821s)

Count by 821

Here we will show you how to count by 821, discuss counting by 821 patterns, and tell you why knowing how to count by 821 matters. To start off, note that Count by 821 means counting in 821s, or count by eight hundred twenty-ones, and it is also called skip counting by 821.

How to count by 821
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 821, we count 821, 1642, 2463, 3284, and so on.

In other words, to count in intervals of 821 or skip counting by 821, we start with 821 and then add 821 to get the next number, and then continue adding 821 to the previous number to keep counting by 821, like this:

821
821 + 821 = 1642
1642 + 821 = 2463
2463 + 821 = 3284
3284 + 821 = 4105
...

You can of course skip count by 821 forever, so it is impossible to make a list of all numbers, but below is a Count by 821 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 821, the second column has the next ten numbers you get when you skip count by 821, and so forth.

Count by 821 Patterns
We organized the Skip Counting by 821s 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 821, but don't have the Counting by 821s Chart above. Obviously, one pattern with counting by 821s is that the number increases by 821.

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 821 goes 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 and 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 and so on for as long as you count by 821.

Why Count by 821?
We think that understanding and learning about skip counting by 821 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.

When you count by eight hundred twenty-one, you are also creating a list of multiples of 821 that you can use in math when you need the least common multiple. 821 times n equals the nth multiple or skip count of 821.

When you skip count by 821, you are also creating a list of numbers that 821 is divisible by. On top of that, skip counting by 821 is the same as making the 821 times table.

Skip Counting
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Count by 822
Here is the next number on our list that we used to skip count.