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The student will be able to apply mathematical process standards to develop and use strategies for whole number addition and subtraction computations in order to solve problems.
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.