Order of Operations (pre-algebra lesson)
From Mammoth2020 on June 25th, 2020
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This is the first part of the lesson on the order of operations. I start out with a mini-review of exponents and then we study the order of operations (PEMDAS rule), followed by a few solved examples.
The lesson explains how to solve these problems using the correct order of operations:
- 10^2 − 8^2
- (10 − 8)^2; notice this is very similar to the expression above but the parenthesis makes a big difference.
- 24 − 2^3 / 4
The acronym PEMDAS (or Please Excuse My Dear Ant Sally) comes from:
Exponents & roots
Multiplication & Division
Addition & Subtraction