Adding in a Given Base

The bottom number, with digits shown in the blue circles, is the sum of the two numbers above, shown in green and red circles. You can change the base or the numbers to be added. Each digit's value is shown in base 1 by yellow semicircles. They spill over to the left as the digit exceeds its base.

THINGS TO TRY

SNAPSHOTS

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Related Curriculum Standards

US Common Core State Standards, Mathematics