# T4T Take it Away

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 Domain Operations and Algebraic Thinking Clusters Add and subtract within 20. Analyze addition and subtraction equations within 20. Standards NC.1.OA.6 Add and subtract, within 20, using strategies such as: • Counting on • Making ten • Decomposing a number leading to a ten • Using the relationship between addition and subtraction • Using a number line • Creating equivalent but simpler or known sums NC 1.OA.8 Determine the unknown whole number in an addition or subtraction equation involving three whole numbers. Materials SF, cubes or counters, pencil Task Provide materials to the student.  Read problem aloud:  Solve the following equation using two different strategies.  14 – 9 = ?

 Continuum of Understanding Not Yet Proficient ●   Strategies Incorrectly solves the problem and does Used: not have strategies that lead to a correct answer q  Trial and Error q  Counting All q  Counting On q  Makes Tens q  Basic Facts q  Creates easier or known sums q  Doubles q  Doubles +/- 1, 2 q  Other: Progressing ● Correctly solves the equation using two different strategies, but uses counting all as a strategy Meets Expectations ● Correctly solves the equation using two different strategies that do not include counting all