Please enable JavaScript to use CodeHS

Common Core Math K-5: 1.NBT.B.2.c

CodeHS Lessons

The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).

This standard does not have any mappings to our lessons yet.