How to Solve Linear & Quadratic Equations
Learn substitution, factoring, quadratic formula and elimination with step-by-step worked examples.
How to Use Significant Figures - Rules & Rounding
Count and round significant figures correctly. Apply rules in addition, subtraction, multiplication and division.
How to Convert Binary - Decimal, Hex & Octal
Learn binary conversion to decimal, hex and octal using bit weights and examples, plus two’s complement basics.
How to Calculate Speed, Distance & Time
Use the speed formula to solve for distance or time with unit conversions and practical travel examples.
How to Use the Suanpan (Chinese) Abacus - Tutorial
Learn the Chinese suanpan (2:5) abacus step by step. Master bead values, complements to 5/10, and fast methods for the four operations.
How to Use the Soroban (Japanese) Abacus - Guide
Step-by-step soroban (1:4) abacus tutorial. Learn bead positions, complements, and efficient methods for addition, subtraction, multiplication and division.
How to Use the Western/School Abacus - Place Value
Teach and learn with a Western place-value abacus. Count, regroup, add and subtract with skip-counting and clear step-by-step activities.