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1.A.1
Develop understandings of addition and subtraction strategies for basic addition facts and related subtraction facts.
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1.A.1.1
Model addition and subtraction situations using the concepts of "part-whole," "adding to," "taking away from," "comparing," and "missing addend."
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1.A.1.2
Identify, describe, and apply addition and subtraction as inverse operations.
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1.A.1.3
Create and use increasingly sophisticated strategies, and use properties such as Commutative, Associative and Additive Identity, to add whole numbers.
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1.A.1.4
Use counting strategies, number patterns, and models as a means for solving basic addition and subtraction fact problems.
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1.A.2
Develop an understanding of whole number relationships, including grouping by tens and ones.
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1.A.2.1
Compare and order whole numbers at least to 100.
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1.A.2.2
Represent two digit numbers in terms of tens and ones.
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1.A.2.3
Order counting numbers, compare their relative magnitudes, and represent numbers on a number line.
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1.G.3
Compose and decompose two-dimensional and three-dimensional geometric shapes.
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1.G.3.1
Use appropriate vocabulary to compare shapes according to attributes and properties such as number and lengths of sides, and number of vertices.
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1.G.3.2
Compose and decompose plane and solid figures, including making predictions about them, to build an understanding of part-whole relationships and properties of shapes.
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1.A.4
Algebra
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1.A.4.1
Extend repeating and growing patterns, fill in missing terms, and justify reasoning.
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1.G.5
Geometry and Measurement
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1.G.5.1
Measure by using iterations of a unit and count the unit measures by grouping units.
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1.G.5.2
Compare and order objects according to descriptors of length, weight and capacity.
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1.A.6
Number and Operations
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1.A.6.1
Use mathematical reasoning and beginning understanding of tens and ones, including the use of invented strategies, to solve two-digit addition and subtraction problems.
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1.A.6.2
Solve routine and non-routine problems by acting them out, using manipulatives, and drawing diagrams.
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