Introduction
Fractions describe parts of a whole — the denominator tells how many equal parts exist, and the numerator tells how many you have. Students usually meet fractions in Grades 2–6: first as pictures and simple comparisons, then as equivalent fractions, mixed numbers, and operations. On this MathDigits hub you can open grade worksheets, use the fraction calculator to check a step, review related formulas, and warm up with games that train number sense.