Count by 9920 (Skip Counting by 9920s)

Count by 9920

Here we will show you how to count by 9920, discuss counting by 9920 patterns, and tell you why knowing how to count by 9920 matters. To start off, note that Count by 9920 means counting in 9920s, or count by nine thousand nine hundred twenties, and it is also called skip counting by 9920.

How to count by 9920
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 9920, we count 9920, 19840, 29760, 39680, and so on.

In other words, to count in intervals of 9920 or skip counting by 9920, we start with 9920 and then add 9920 to get the next number, and then continue adding 9920 to the previous number to keep counting by 9920, like this:

9920
9920 + 9920 = 19840
19840 + 9920 = 29760
29760 + 9920 = 39680
39680 + 9920 = 49600
...

You can of course skip count by 9920 forever, so it is impossible to make a list of all numbers, but below is a Count by 9920 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 9920, the second column has the next ten numbers you get when you skip count by 9920, and so forth.

Count by 9920 Patterns
We organized the Skip Counting by 9920s 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 9920, but don't have the Counting by 9920s Chart above. Obviously, one pattern with counting by 9920s is that the number increases by 9920.

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 1 over and over. The pattern of the last digit when you count by 9920 goes 0 and 0 and so on for as long as you count by 9920.

Why Count by 9920?
We think that understanding and learning about skip counting by 9920 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 thousand nine hundred twenty, you are also creating a list of multiples of 9920 that you can use in math when you need the least common multiple. 9920 times n equals the nth multiple or skip count of 9920.

When you skip count by 9920, you are also creating a list of numbers that 9920 is divisible by. On top of that, skip counting by 9920 is the same as making the 9920 times table.

Skip Counting
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Count by 9921
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