All Tools

Solve a missing value in equivalent ratios and verify the result using equal cross products.

Find the greatest common factor of integers using factor lists, prime factorization or Euclid’s algorithm.

Find the least common multiple of integers using prime factors or the relationship between LCM and GCF.

Break a positive integer into its unique product of prime powers and review factor-tree logic.

Round numbers to a selected place or significant figures and distinguish common rounding methods.

Perform long division with a quotient, remainder and step-by-step divide-multiply-subtract work.

Solve a quadratic equation from coefficients a, b and c and interpret its discriminant and roots.

Calculate the area of common two-dimensional shapes using dimensions in compatible units.

Calculate the volume of common three-dimensional solids using measurements in compatible units.

Solve a triangle’s missing sides, angles, area and perimeter from sufficient known measurements.