Adding and subtracting: Extending concepts

Know the distribution of the days of the week and months of the year, and use the calendar to find dates and determine lengths of time.
Explore regularities in the numerical series to name, read, and write natural numbers.
Learn to conventionally read and write natural numbers comprised of two digits.
Expand the repertoire of memorised calculations and use them to solve other calculations.
Identify symbolic representations that can be associated with each problem.