Count by 391 (Skip Counting by 391s)

Count by 391

Here we will show you how to count by 391, discuss counting by 391 patterns, and tell you why knowing how to count by 391 matters. To start off, note that Count by 391 means counting in 391s, or count by three hundred ninety-ones, and it is also called skip counting by 391.

How to count by 391
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 391, we count 391, 782, 1173, 1564, and so on.

In other words, to count in intervals of 391 or skip counting by 391, we start with 391 and then add 391 to get the next number, and then continue adding 391 to the previous number to keep counting by 391, like this:

391
391 + 391 = 782
782 + 391 = 1173
1173 + 391 = 1564
1564 + 391 = 1955
...

You can of course skip count by 391 forever, so it is impossible to make a list of all numbers, but below is a Count by 391 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 391, the second column has the next ten numbers you get when you skip count by 391, and so forth.

Count by 391 Patterns
We organized the Skip Counting by 391s 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 391, but don't have the Counting by 391s Chart above. Obviously, one pattern with counting by 391s is that the number increases by 391.

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 391 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 391.

Why Count by 391?
We think that understanding and learning about skip counting by 391 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-one, you are also creating a list of multiples of 391 that you can use in math when you need the least common multiple. 391 times n equals the nth multiple or skip count of 391.

When you skip count by 391, you are also creating a list of numbers that 391 is divisible by. On top of that, skip counting by 391 is the same as making the 391 times table.

Skip Counting
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Count by 392
Here is the next number on our list that we used to skip count.