Addition and subtraction facts; missing numbers.
To know how many to next multiple of 10.
To add and subtract 10/20; extend to 11/21.
To use facts to add several numbers.
To add and subtract numbers bridging 10.
To add and subtract using facts and place value.
To use facts and patterns to add and subtract.
To add and subtract multiples of 10.
To add and subtract 11, 12, 21, 22…
To add and subtract near multiples of 10.
To add pairs of 2-digit numbers.
To use facts, patterns and place value to add and subtract.
To use a number line/grid to add and subtract.
To find money totals: solve word problems.
To add and double by partitioning.
To find change.
To subtract by counting back.
To choose a strategy to subtract numbers.
To add by partitioning or counting on.
To choose strategies to subtract.