Bridge Buddies

Build the missing part. Help a friend cross.

Choose a trail

Count on to build the missing part. Use it to subtract, then help your fox cross. Six bridges, at your own pace.

Worksheet trailThink addition to subtract within 20Little bridgesBuild and subtract within 10New adventureFresh missing parts within 20

The missing part completes both facts.

Choose a trail. Add pieces to build the missing part, then use the same part to subtract. Help your fox cross six bridges.

Keyboard: focus the activity, use arrow keys or + / − to change pieces, then Enter to check. Escape pauses. No timer on the math.