Use the relationship between factors and multiples for whole numbers.
Algebra and Functions
Operations & Algebraic Thinking: Gain familiarity with factors and multiples.
Look for and make use of structure.
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Make use of the structure of numbers when making tens or when creating equivalent but easier or known sums.
Reason about what it means for numbers to be even and odd.
Compose, decompose, and compare three-digit numbers according to their base-ten structure.
Look for structures and notation that make the order of operations clear when reading and writing mathematical expressions.
Reason that counting to 100 by tens reaches the same number as can be counted repeatedly by ones.