Begins to solve equations with missing addends through the process of inverse operation with the use of a number line. Adds and subtracts two-digit numbers without regrouping. Begins addition and subtraction of two-digit numbers with regrouping. Applies commutative property of addition. Learns property of zero in addition and 0 as the subtrahend.
Estimates approximate sums and differences.
Tells and sets time by quarter hour and 5 minute intervals. Learns value of all coins. Uses appropriate symbols for recording monetary amounts. Expands calendar skills to include months of the year. Identifies unit of measurement appropriate to task.