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Key Standards Supported
Operations And Algebraic Thinking
|1.OA: Add And Subtract Within 20.|
|1.OA.5||Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).|
|1.OA.6||Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).|
|Represent And Solve Problems Involving Addition And Subtraction.|
|1.OA.2||Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.|
|2.OA: Add And Subtract Within 20.|
|2.OA.2||Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.|
|K.OA: Understand Addition As Putting Together And Adding To, And Under- Stand Subtraction As Taking Apart And Taking From.|
|K.OA.4||For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or drawings, and record the answer with a drawing or equation.|
|K.OA.5||Fluently add and subtract within 5.|
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