Number Line Hopper

About this app

A frog hops along the number line from 0 to 20: +3 means three hops forward from the start stone — you count the arcs, not the stones. The hop arcs stay visible as a trail while the equation builds in sync at the top (4 + 3 = 7). An error demo shows the classic off-by-one counting trap (counting the start stone) right next to the correct way. In level mode children guide the frog to the star target stone using plus and minus jumps.

Subject: Elementary · Maths

More from Elementary · Maths

• Fraction pizza
• Multiplication arrays
• Times Table Trainer
• Shape Explorer
• Geoboard
• Even or Odd
• Hundred Chart
• Measuring Length

A VisuApp by heyprof: interactive, free in your browser, no sign-up. What is a VisuApp? · All apps