Math

Use the Round to the Nearest Cent Calculator to round amounts to the nearest cent with correct half-up rules for everyday pricing.

Use a Summation Calculator to add sequences and series quickly. Compute totals for arithmetic and geometric patterns with clear results.

Use this Rational or Irrational Calculator to classify numbers as rational or irrational and see the reasoning instantly.

Use a Unit Rate Calculator to find cost, speed, or output per unit. Learn formulas, conversions, and how to compare options fast.

Use a Combining Like Terms Calculator to simplify algebraic expressions by adding coefficients of like terms accurately and quickly.

Use the Perfect Square Trinomial Calculator to factor and expand expressions of the form (x±a)^2. Get verified steps and exact results.

Use an Additive Inverse calculator to find the number that sums to zero with your input. Works for integers, decimals, and negatives.

Use a Weighted Average Calculator to compute scores, costs, or averages when values have different importance. Get the formula and examples.

Use this Significant Figures Calculator to determine the number of significant figures in a value and format it correctly for scientific work.

Learn how quotient and remainder work in division. Use the Quotient and Remainder Calculator to compute results and verify your math.