The CalcSolver Blog
Practical, accurate guides on math and calculators — written and reviewed by our editorial team, and explained step by step.
How to Find the Area of a Triangle (4 Methods)
From the classic ½ × base × height to Heron's formula for three sides, here are four reliable ways to find the area of any triangle — with examples.
Mean, Median and Mode Explained (With Examples)
The three "averages" — mean, median and mode — what each one measures, how to calculate them, and which to use when your data has outliers.
How to Calculate Percentages Quickly (Without a Calculator)
Mental-math tricks for percentages — the 10% method, the reversal trick, tips, discounts and percentage change — plus when to reach for a calculator.
Order of Operations (PEMDAS) Explained Simply
PEMDAS, BODMAS, BIDMAS — they all mean the same thing. Here's how the order of operations works, why it matters, and the traps that catch people out.
How to Use a Scientific Calculator (A Beginner's Guide)
Learn what every key on a scientific calculator does — from sin, cos and tan to memory keys, exponents and the difference between DEG and RAD.