Count by 638 (Skip Counting by 638s)

Count by 638

Here we will show you how to count by 638, discuss counting by 638 patterns, and tell you why knowing how to count by 638 matters. To start off, note that Count by 638 means counting in 638s, or count by six hundred thirty-eights, and it is also called skip counting by 638.

How to count by 638
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 638, we count 638, 1276, 1914, 2552, and so on.

In other words, to count in intervals of 638 or skip counting by 638, we start with 638 and then add 638 to get the next number, and then continue adding 638 to the previous number to keep counting by 638, like this:

638
638 + 638 = 1276
1276 + 638 = 1914
1914 + 638 = 2552
2552 + 638 = 3190
...

You can of course skip count by 638 forever, so it is impossible to make a list of all numbers, but below is a Count by 638 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 638, the second column has the next ten numbers you get when you skip count by 638, and so forth.

Count by 638 Patterns
We organized the Skip Counting by 638s 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 638, but don't have the Counting by 638s Chart above. Obviously, one pattern with counting by 638s is that the number increases by 638.

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 5 over and over. The pattern of the last digit when you count by 638 goes 8, 6, 4, 2, 0 and 8, 6, 4, 2, 0 and so on for as long as you count by 638.

Why Count by 638?
We think that understanding and learning about skip counting by 638 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.

When you count by six hundred thirty-eight, you are also creating a list of multiples of 638 that you can use in math when you need the least common multiple. 638 times n equals the nth multiple or skip count of 638.

When you skip count by 638, you are also creating a list of numbers that 638 is divisible by. On top of that, skip counting by 638 is the same as making the 638 times table.

Skip Counting
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Count by 639
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