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Understand numbers, ways of representing numbers,
relationships among numbers, and number systems
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•count
with understanding and recognize “how many” in sets of objects;
•use
multiple models to develop initial understandings of place value and the
base-ten number system;
•develop
understanding of the relative position and magnitude of whole numbers and
of ordinal and cardinal numbers and their connections;
•develop
a sense of whole numbers and represent and use them in flexible ways,
including relating, composing, and decomposing numbers;
•connect
number words and numbers to the quantities they represent, using various
physical models and representations;
•understand
and represent commonly used fractions, such as 1/4,1/3, and 1/2
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Understand meanings of operations and how they relate to
one another
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•understand
various meanings of addition and subtraction of whole numbers and the
relationship between the two operations;
•understand
the effects of adding and subtracting whole numbers;
•Understand
situations that entail multiplication and division, such as equal groupings
of objects and sharing equally.
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Compute fluently and make reasonable estimates
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•develop
and use strategies for whole-number computations, with a focus on addition
and subtraction;
•develop
fluency with basic number combinations for addition and subtraction;
•use
a variety of methods and tools to compute, including objects, mental
computation, estimation, paper and pencil, and calculators.
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