🔢 Math Calculators

Divide in Quick, Quotient and Remainder, or Decimal Precision mode

Solve the unknown in a proportion using cross multiplication with step-by-step output and verify mode

Multiply a list of numbers with sign summary and multiplication chain

Subtract two numbers or subtract a list from a starting value in two modes

Multiply whole numbers using the box/area model and place-value decomposition

Calculate the absolute value of a number

Solve for the missing value among initial, final and absolute change

Perform the four basic operations on decimal numbers without floating-point artifacts

Solve for the unknown in A/B = C/D

Compare two numbers and see >, <, or = with explanation; supports decimals and negatives

Addition, subtraction, multiplication, division, exponent, and root checks with integers

Add a list of numbers and see the sum and addition chain

Round numbers to 10 or 5 for mental math; see the approximate result and signed error

Multiply two numbers step by step with partial rows, decimal and negative support

Subtract positive numbers step by step with borrowing and aligned column display

Add positive numbers step by step with carrying and aligned column display

Round a number by selected precision and rounding mode

Calculate percentage change and ratio

Multiply binomials or factor a quadratic trinomial with the area model

Demonstrate the associative property numerically for addition and multiplication

Expand a×(b+c) or find the common factor of two terms

Find the possible number of positive, negative, and complex roots from sign changes in f(x) and f(−x)

Work with y = kx: find k, solve x or y, or check two points

Solve, build, or verify a diamond problem with visual diamond diagram

Expand (ax+b)(cx+d) using FOIL; see First, Outer, Inner, Last steps and the combined trinomial

Multiply two binomials (ax+b)(cx+d) with FOIL steps and see the expanded polynomial

Expand (a+b)² and (a-b)² step by step; highlights the common mistake (a+b)² ≠ a²+b²

Factor quadratic trinomials visually with the 2×2 box method

Divide one polynomial by another using long division; step table, quotient, remainder and identity check

Multiply two single-variable polynomials; see every partial product and the combined standard-form result

Add or subtract single-variable polynomials with like-terms grouping and standard form steps

Generate and test the possible rational zeros (±p/q) of an integer-coefficient polynomial

Divide a polynomial by (x − r) using synthetic division; table, quotient, remainder and root test

Detect, factor, or build perfect square trinomials from binomial squares

Work with y = k/x: find k, solve x or y, or check two points

Factor ax²+bx+c quadratic trinomials step by step using reverse FOIL and grouping

Factor ax²+bx+c using the AC method: find a×c, the factor pair, split the middle term, and group

Calculate the discriminant for quadratic and cubic equations with formula, substitution step and root-type interpretation

Solve ax²+bx+c=0 with the quadratic formula; substitution, discriminant, exact and approximate roots

Solve structured absolute value equations p|ax+b|+q=r step by step with two-case split and verification

Solve ax²+bx+c=0 by completing the square with step-by-step transformation, vertex form, discriminant and roots

Find all three roots of ax³+bx²+cx+d=0, classified as real, complex, or repeated

Classify and solve a 2×2 or 3×3 system with a method selector (auto, elimination, substitution, matrix)

Solve a 2×2 linear system: isolate, substitute, solve, and back-substitute

Solve a 2×2 or 3×3 linear system step by step using the elimination method

Convert between interval notation and inequality in either direction, including unions and the empty set

Isolate a linear inequality and convert it directly to interval notation

Solve ax²+bx+c [op] 0 for Δ>0, Δ=0, and Δ<0, with a sign chart and interval notation