"PEMDAS Secrets You’re Ignoring That Will Change How You Do Math! - Parker Core Knowledge

Understanding the Context

What Is PEMDAS — and Why It Matters More Than You Think

PEMDAS is the mnemonic for the order of operations:
Parentheses
Exponents
Multiplication and Division (left to right)
Addition and Subtraction (left to right)

It’s not just a memory trick—it’s a roadmap for evaluating expressions correctly. Without mastering this order, even simple problems can lead to wildly incorrect answers — and that’s where many students freeze when faced with multistep calculations.

Key Insights

The Big Secret: PEMDAS Isn’t About Priority — It’s About Consistency

Most learners think PEMDAS means multiplication always beats addition, but the real power lies in consistency. Parentheses change the rules — inside them override all other operations, no matter what comes next.

Example:
3 + 5 × 2
Most rush to multiply first → 5×2 = 10 → 3+10 = 13
But what if?
3 + (5 × 2) → inside parentheses resolved first → 3+10 = 13
3 + 5 × 2 — wait, should it be 3+10? Yes — because multiplication remains before addition.
But here’s the secret: if an equation includes exponents, they dominate:
2 + 3² × 4
Step 1: Exponent → 3² = 9
Step 2: Multiplication → 9 × 4 = 36
Step 3: Addition → 2 + 36 = 38
That’s not random — it’s logic.

Final Thoughts

PEMDAS Secrets That Will Revolutionize Your Math

1. Never Skip Parentheses — They Direct the Flow

Parentheses tell you where to begin. Misapplying PEMDAS by skipping them leads to miscalculations.
Example:
6 ÷ (4 − 2³) × 3
→ Inside parentheses: 4 − 8 = −4
→ Now apply: division and multiplication left to right
→ −4³ = −64 → 6 ÷ (−64) = −0.09375 × 3 = −0.28125

Without honoring parentheses, you’d miscalculate entirely.

Pro Tip: Always resolve expressions inside parentheses first—no exceptions.