1.3: Number and operations. The student applies mathematical process standards to develop and use strategies for whole number addition and subtraction computations in order to solve problems.

Number and operations. The student applies mathematical process standards to develop and use strategies for whole number addition and subtraction computations in order to solve problems.

1.3.AUse concrete and pictorial models to determine the sum of a multiple of 10 and a one-digit number in problems up to 99.1.3.BUse objects and pictorial models to solve word problems involving joining, separating, and comparing sets within 20 and unknowns as any one of the terms in the problem such as 2 + 4 = [ ]; 3 + [ ] = 7; and 5 = [ ] - 3.1.3.CCompose 10 with two or more addends with and without concrete objects.1.3.DApply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10.1.3.EExplain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences.1.3.FGenerate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20.
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