Some operations can be written in a variety of forms. You should become familiar with the different forms. Following are several ways to show multiplication:

- Multiplication sign: 4 × 3 = 12

- Multiplication dot: 4 · 3 = 12

- Two sets of parentheses: (4)(3) = 12

- One set of parentheses: 4(3) = 12 or (4)3 = 12

- A number next to a variable (letter): 3
*a* means 3 times *a*.

- Two variables (letters) next to each other:
*ab* means *a* times *b*.

There are several ways to show division:

**Division sign:** 10 ÷ 2 = 5

**Fraction bar:** = 5 or 10/2 = 5