Common Core Math K-5: 1.NBT.C.6
CodeHS Lessons
Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
This standard does not have any mappings to our lessons yet.