IN Math K-5: 1.NS.5
CodeHS Lessons
Find mentally ten more or ten less than a given two-digit number without having to count, and explain the thinking process used to get the answer.
This standard does not have any mappings to our lessons yet.
Find mentally ten more or ten less than a given two-digit number without having to count, and explain the thinking process used to get the answer.
This standard does not have any mappings to our lessons yet.
