Here we will show you how to count by 1580, discuss counting by 1580 patterns, and tell you why knowing how to count by 1580 matters. To start off, note that Count by 1580 means counting in 1580s, or count by one thousand five hundred eighties, and it is also called skip counting by 1580.
How to count by 1580
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 1580, we count 1580, 3160, 4740, 6320, and so on.
In other words, to count in intervals of 1580 or skip counting by 1580, we start with 1580 and then add 1580 to get the next number, and then continue adding 1580 to the previous number to keep counting by 1580, like this:
1580
1580 + 1580 = 3160
3160 + 1580 = 4740
4740 + 1580 = 6320
6320 + 1580 = 7900
...
You can of course skip count by 1580 forever, so it is impossible to make a list of all numbers, but below is a Count by 1580 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 1580, the second column has the next ten numbers you get when you skip count by 1580, and so forth.
Count by 1580 Patterns
We organized the Skip Counting by 1580s 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 1580, but don't have the Counting by 1580s Chart above. Obviously, one pattern with counting by 1580s is that the number increases by 1580.
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 1580 goes 0 and 0 and so on for as long as you count by 1580.
Why Count by 1580?
We think that understanding and learning about skip counting by 1580 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.
When you count by one thousand five hundred eighty, you are also creating a list of multiples of 1580 that you can use in math when you need the least common multiple. 1580 times n equals the nth multiple or skip count of 1580.
When you skip count by 1580, you are also creating a list of numbers that 1580 is divisible by. On top of that, skip counting by 1580 is the same as making the 1580 times table.
Skip Counting
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Count by 1581
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