02:34
Word Problems: Two-Step Problem, A
This clip introduces the use of parentheses in two-step problems, explaining that the first step is always to solve the problem inside the parentheses, and then use that answer to solve the main problem.
00:39
Writing Expressions in Their Simplest Form
A simplified expression is one in which each base is written only once, there are no negative exponents, and no parentheses. Simplifying an expression makes it easier to solve complex problems, and using the rules for exponents makes simplifying exp...
01:00
More than One Base Raised to a Negative Power
The rule for raising a power to a power is applied to an expression in which a monomial in parentheses is raised to a negative power.