Adding, Subtracting, Multiplying and Dividing Fractions Quiz

Interactive quiz on fraction arithmetic: add, subtract, multiply, and divide improper fractions. Two modes: Practice (untimed, 10/20/30 questions with immediate feedback) and Sprint (timed, 2/5/10 minutes, answer as many as possible). All answers must be given in simplest form with both numerator and denominator (or leave denominator blank/enter 1 for whole numbers). Warns if answer is equivalent but not simplified. Results summary shows missed problems for targeted revision.