PEMDAS
parenthesis, exponents, multiplication, division, addition, subtraction.
if i asked you 2 + 3 * 6, you MUST multiply 3 * 6 first, because it comes before addition in the PEMDAS
2 + 3 * 6 = 20,
2 + 3 * 6 does not = 30.
another example:
(5 + 2) * 2 + 5 =
(7) * 2 + 5 =
14 + 5 =
19
hope this helped!
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There's a rule?
The rule for multiplying by 1 is, everything multiplied by 1 is the answer.For example, 2multiplied by 1 is 2.
The rule depends on what you wish to do with the ratio.
England
There are infinitely many cubic functions that can be the rule for the above set of numbers. The simplest, though, is the linear rule: Un = 8n - 1 for n = 1, 2, 3, ...