In general, the word “pattern” defines groups of things with characteristics that repeat in a predictable way.

Algebraic patterns are number patterns with sequences based on addition or subtraction.

We can use addition or subtraction to predict the next few numbers in the pattern. But to predict the series, we need two or more numbers.

**For example:**

1, 2, 3, 5, 8, 13, ___, ___

the rule for this Algebraic pattern is "add the previous two numbers in the pattern together to find the next number."

i.e., 1 + 2 = 3 and 2 + 3 = 5 and 3 + 5 = 8.

So let us add 8 + 13 and get 21 and 13 + 21 to get 34.

So pattern looks like 1, 2, 3, 5, 8, 13, 21, 34.