Two stone platforms float over a chasm. Build the bridge: use left −/+ to set the left part and right −/+ to set the right part (you can also drag on each side). The bridge connects when the two parts add up to exactly span the gap. Then press Check
3D math game · Best for grades 1-2
Split a whole number into two parts that compose it, and a crystal bridge spans the chasm
Splitting a number into two parts shows that one whole can be composed in several correct ways.
The game builds understanding of Arithmetic. Two stone platforms float over a chasm. Build the bridge: use left −/+ to set the left part and right −/+ to set the right part (you can also drag on each side). The bridge connects when the two parts add up to exactly span the gap. Then press Check
calculation, number composition, place value, and basic operations.
Students see the quantity, adjust it directly, and check the result immediately.
This builds number sense instead of relying only on memorized answers.
Use it for individual practice, paired work, or a short class demonstration before worksheets.
Start with the game above, then continue with written practice to reinforce the skill.