Tap, drag & explore — learn by doing
Enter two integers and pick an operation. A ball will hop unit by unit along the number line showing every step of the journey — arcs above the line trace each unit moved. Drag the line to extend it either way!
Enter any fraction below. The diagram shows whole circles for complete parts and a partial circle for the remainder — just like a mixed number!
Enter two fractions and pick an operation. The result is shown as a fraction, mixed number (if improper), and marked on the number line below. Drag the line to explore.
Slide the sliders to resize each shape. All measurements, labels, and formulas update live on the diagram.