OA Task 5d Operations and Algebraic Thinking Domain Represent and solve problems involving addition and subtraction. Cluster Add and subtract within 20. Standard(s) 1.OA.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing with unknowns in all positions, e.g., by using objects, drawings and equations with a symbol for the unknown number to represent the problem. 1.OA.6 Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Compare/Difference Unknown- many more” version “How Materials SF, Cubes or counters, pencil Task Provide materials to the student. Read the problem to the student: Emma has 12 bands. Aidan has 18 silly bands. How many more silly bands does Aidan have than Emma? Write a number sentence that matches this story. Use a symbol for the unknown number. Once an equation is written, say: Solve the problem and show your thinking with pictures, numbers, or words. Continuum of Understanding Incorrectly solves the problem with an answer than 6. Strategy(ies) Used: Developing Understanding Relies on all” as primary strategy for solving and Error “counting problem. Counting All Equation is inaccurate. Counting On Explanation is lacking in detail or non-existent. Makes Tens Complete Correctly solves the problem: 6 bands Facts Think Addition Understanding Successfully uses strategies such as basic facts, Creates easier or and/or the relationship between addition and subtraction known sums Doubles Explanation is clear. Equation is accurate (e.g., 12 + * = 18; 18 - * = 12). Doubles +/- 1, 2 Other: Standards for Mathematical Practice 1. Makes sense and perseveres in solving problems. 2. Reasons abstractly and quantitatively. 3. Constructs viable arguments and critiques the reasoning of others. 4. Models with mathematics. 5. Uses appropriate tools strategically. 6. Attends to precision. 7. Looks for and makes use of structure. 8. Looks for and expresses regularity in repeated reasoning.
OA Task 5d Domain Operations and Algebraic Thinking Cluster Represent and solve problems involving addition and subtraction. Add and subtract within 20. Standard(s) 1.OA.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing with unknowns in all positions, e.g., by using objects, drawings and equations with a symbol for the unknown number to represent the problem. 1.OA.6 Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Compare/Difference Unknown- “How many more” version Materials SF, Cubes or counters, pencil Task Provide materials to the student. Read the problem to the student: Emma has 12 bands. Aidan has 18 silly bands. How many more silly bands does Aidan have than Emma? Write a number sentence that matches this story. Use a symbol for the unknown number. Once an equation is written, say: Solve the problem and show your thinking with pictures, numbers, or words. Continuum of Understanding Developing Understanding Incorrectly solves the problem with an answer than 6. Relies on “counting all” as primary strategy for solving problem. Equation is inaccurate. Explanation is lacking in detail or non-existent. Strategy(ies) Used: and Error Counting All Counting On Makes Tens Facts Think Addition Creates easier or known sums Doubles Doubles +/- 1, 2 Other: Complete Understanding Correctly solves the problem: 6 bands Successfully uses strategies such as basic facts, and/or the relationship between addition and subtraction Explanation is clear. Equation is accurate (e.g., 12 + * = 18; 18 - * = 12). Standards for Mathematical Practice 1. Makes sense and perseveres in solving problems. 2. Reasons abstractly and quantitatively. 3. Constructs viable arguments and critiques the reasoning of others. 4. Models with mathematics. 5. Uses appropriate tools strategically. 6. Attends to precision. 7. Looks for and makes use of structure. 8. Looks for and expresses regularity in repeated reasoning.
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