Count by 390 (Skip Counting by 390s)

Count by 390

Here we will show you how to count by 390, discuss counting by 390 patterns, and tell you why knowing how to count by 390 matters. To start off, note that Count by 390 means counting in 390s, or count by three hundred nineties, and it is also called skip counting by 390.

How to count by 390
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 390, we count 390, 780, 1170, 1560, and so on.

In other words, to count in intervals of 390 or skip counting by 390, we start with 390 and then add 390 to get the next number, and then continue adding 390 to the previous number to keep counting by 390, like this:

390
390 + 390 = 780
780 + 390 = 1170
1170 + 390 = 1560
1560 + 390 = 1950
...

You can of course skip count by 390 forever, so it is impossible to make a list of all numbers, but below is a Count by 390 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 390, the second column has the next ten numbers you get when you skip count by 390, and so forth.

Count by 390 Patterns
We organized the Skip Counting by 390s 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 390, but don't have the Counting by 390s Chart above. Obviously, one pattern with counting by 390s is that the number increases by 390.

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 390 goes 0 and 0 and so on for as long as you count by 390.

Why Count by 390?
We think that understanding and learning about skip counting by 390 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.

When you count by three hundred ninety, you are also creating a list of multiples of 390 that you can use in math when you need the least common multiple. 390 times n equals the nth multiple or skip count of 390.

When you skip count by 390, you are also creating a list of numbers that 390 is divisible by. On top of that, skip counting by 390 is the same as making the 390 times table.

Skip Counting
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Count by 391
Here is the next number on our list that we used to skip count.