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Kids Number Line CalculatorPractice addition jumps on a number line with visual movement and guided step explanations.Score 76numberlineDeadline Buffer CalculatorCalculate remaining buffer days before a deadline.Score 38lineNumber Comparison CalculatorCompare two values by difference, ratio, and percentage difference.Score 38numberLinear Equation CalculatorCalculate slope, intercept, and value for a linear equation y = mx + b.Score 38lineDeadline CalculatorEstimate deadline offset from start day, duration, review buffer, and weekend/holiday adjustment.Score 38lineQuantum Number CalculatorCheck simple quantum number ranges, shell capacity, and orbital counts.Score 38numberAtomic Number LookupFind an element by atomic number and view its symbol, mass, group, period, and category.Score 38numberAssignment Deadline CalculatorEstimate assignment schedule from work hours, days available, and revision buffer.Score 30lineSpin Quantum Number CalculatorCalculate spin multiplicity, spin states, and basic spin angular momentum estimates.Score 30numberInteractive Periodic Table & Element FinderSearch elements by name, symbol, atomic number, or approximate atomic mass, then view atomic data and temperature state estimates.Score 24numberElement FinderFind an element from its name, symbol, atomic number, or approximate atomic mass.Score 24numberMonthly Savings CalculatorCalculate monthly savings needed to hit a target by a deadline.Score 22lineMatrix Addition CalculatorAdd two 2x2 matrices entry by entry.Score 22lineMatrix Multiplication CalculatorMultiply two 2x2 matrices.Score 22lineInverse Matrix CalculatorCalculate inverse entries for a 2x2 matrix.Score 22lineAvogadro's Number CalculatorConvert moles to particles using Avogadro's number.Score 20numberKids LCM CalculatorFind the least common multiple by listing colored multiples and spotting the first shared number.Score 16numberPercentage CalculatorCalculate percentages, percent change, discounts, increases, and reverse percentages.Score 14numberAverage CalculatorCalculate the average of four values.Score 14numberEquation SolverSolve a linear equation of the form ax + b = c.Score 14line