About A collection of modular TypeScript functions for fundamental mathematical operations, including addition, subtraction, multiplication, and division.

But the 'special rule' here is the order of operations PEMDAS: parentheses first, then exponents, multiplication and division, and finally addition and subtraction.

The Common Core State Standards teach students the algorithm for multi-digit addition and subtraction in 4th grade. But some experts say it should be taught sooner.