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Problem Solving compare examine explain explore formulate identify the problem interpret justify make observations modeling and simulating Reasoning and Proof develop an argument explore guesses investigate justify claims true/false use trial and error Communication formulate questions organize share ideas use the language of mathematics Connections apply mathematics compare similarities and differences recognize patterns understand meaning of operations understand relationships Number Sense and Operation collection commutative property of addition compensation compose decompose division doubles doubles minus one doubles plus one estimate even number fact family (related facts) fair share hundred chart identity element for addition label multiplication odd number place value regroup repeated addition repeated subtraction two-digit number zero as the identity element in addition Algebra decreasing sequences equal to greater than (>) increasing sequences less than (<) whole numbers Geometry compose shapes decompose shapes flip (reflection) irregular shape line symmetry properties rectangle regular shapes slide (translation) square triangle turn (rotation) Measurement dollar ($) equivalent estimate feet half hour heavier lighter nonstandard units standard units Statistics and Probability compare data predict similarities/differences tallies tally mark
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