1.CE.1

The student will recall with automaticity addition and subtraction facts within 10 and represent, solve, and justify solutions to single-step problems, including those in context, using addition and subtraction with whole numbers within 20.

1.CE.1.aRecognize and describe with fluency part-part-whole relationships for numbers up to 10 in a variety of configurations.1.CE.1.bDemonstrate fluency with addition and subtraction within 10 by applying reasoning strategies (e.g., count on/count back, one more/one less, doubles, make ten).1.CE.1.cRecall with automaticity addition and subtraction facts within 10.1.CE.1.dInvestigate, recognize, and describe part-part-whole relationships for numbers up to 20 in a variety of configurations (e.g., beaded racks, double ten frames).1.CE.1.eSolve addition and subtraction problems within 20 using various strategies (e.g., inverse relationships: if 9 + 3 = 12 then 12 – 3 = 9; decomposition using known sums/differences: 9 + 7 can be thought of as 9 decomposed into 2 and 7, then use doubles, 7 + 7 = 14; 14 + 2 = 16 or decompose the 7 into 1 and 6; make a ten: 1 + 9 = 10; 10 + 6 = 16).1.CE.1.fRepresent, solve, and justify solutions to single-step addition and subtraction problems (join, separate, and part-part-whole) within 20, including those in context, using words, objects, drawings, or numbers.1.CE.1.gDetermine the unknown whole number that will result in a sum or difference of 10 or 20 (e.g., 14 – __ = 10 or 15 + __ = 20).1.CE.1.hIdentify and use (+) as a symbol for addition and (–) as a symbol for subtraction.1.CE.1.iDescribe the equal symbol (=) as a balance representing an equivalent relationship between expressions on either side of the equal symbol (e.g., 6 and 1 is the same as 4 and 3; 6 + 1 is balanced with 4 + 3; 6 + 1 = 4 + 3).1.CE.1.jUse concrete materials to model, identify, and justify when two expressions are not equal (e.g., 10 – 3 is not equal to 3 + 5).1.CE.1.kUse concrete materials to model an equation that represents the relationship of two expressions of equal value.1.CE.1.lWrite an equation that could be used to represent the solution to an oral, written, or picture problem.
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