What is the basic fruit of Chemistry?
The avocado. This is because avocado sounds very similar to Avogadro. And, Avogadro's Number is the first major concept required to learn Chemistry.
What is the secret to learning Calculus?
The secret to learning Calculus is learning Algebra and Trig. Calculus is really just Algebra and Trig. with just a little extra.
Even if you don't have a rude Aunt Sally, always user her to remember the correct Order of Operations.
Please Excuse My Dear Aunt Sally: Parenthesis then Exponents then Multiply/Divide then Add/Subtract.