Count by 45 (Skip Counting by 45s)

Count by 45

Here we will show you how to count by 45, discuss counting by 45 patterns, and tell you why knowing how to count by 45 matters. To start off, note that Count by 45 means counting in 45s, or count by forty-fives, and it is also called skip counting by 45.

How to count by 45
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 45, we count 45, 90, 135, 180, and so on.

In other words, to count in intervals of 45 or skip counting by 45, we start with 45 and then add 45 to get the next number, and then continue adding 45 to the previous number to keep counting by 45, like this:

45
45 + 45 = 90
90 + 45 = 135
135 + 45 = 180
180 + 45 = 225
...

You can of course skip count by 45 forever, so it is impossible to make a list of all numbers, but below is a Count by 45 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 45, the second column has the next ten numbers you get when you skip count by 45, and so forth.

Count by 45 Patterns
We organized the Skip Counting by 45s 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 45, but don't have the Counting by 45s Chart above. Obviously, one pattern with counting by 45s is that the number increases by 45.

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 45 goes 5, 0 and 5, 0 and so on for as long as you count by 45.

Why Count by 45?
We think that understanding and learning about skip counting by 45 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.

When you count by forty-five, you are also creating a list of multiples of 45 that you can use in math when you need the least common multiple. 45 times n equals the nth multiple or skip count of 45.

When you skip count by 45, you are also creating a list of numbers that 45 is divisible by. On top of that, skip counting by 45 is the same as making the 45 times table.

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

Count by 46
Here is the next number on our list that we used to skip count.