Count by 15 (Skip Counting by 15s)

Count by 15

Here we will show you how to count by 15, discuss counting by 15 patterns, and tell you why knowing how to count by 15 matters. To start off, note that Count by 15 means counting in 15s, or count by fifteens, and it is also called skip counting by 15.

How to count by 15
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 15, we count 15, 30, 45, 60, and so on.

In other words, to count in intervals of 15 or skip counting by 15, we start with 15 and then add 15 to get the next number, and then continue adding 15 to the previous number to keep counting by 15, like this:

15
15 + 15 = 30
30 + 15 = 45
45 + 15 = 60
60 + 15 = 75
...

You can of course skip count by 15 forever, so it is impossible to make a list of all numbers, but below is a Count by 15 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 15, the second column has the next ten numbers you get when you skip count by 15, and so forth.

Count by 15 Patterns
We organized the Skip Counting by 15s 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 15, but don't have the Counting by 15s Chart above. Obviously, one pattern with counting by 15s is that the number increases by 15.

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 2 over and over. The pattern of the last digit when you count by 15 goes 5, 0 and 5, 0 and so on for as long as you count by 15.

Why Count by 15?
We think that understanding and learning about skip counting by 15 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.

When you count by fifteen, you are also creating a list of multiples of 15 that you can use in math when you need the least common multiple. 15 times n equals the nth multiple or skip count of 15.

When you skip count by 15, you are also creating a list of numbers that 15 is divisible by. On top of that, skip counting by 15 is the same as making the 15 times table.

Skip Counting
Need to skip count by another number? Enter another number for us to skip count for you.

Count by 16
Here is the next number on our list that we used to skip count.