The student will be able to:
: compose 10 with two or more addends with and without concrete objects;
: apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10;
: explain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences; and
: generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20.