OA Task 12b Operations and Algebraic Thinking Domain Cluster Work with addition and subtraction equations. Standard(s) 1.OA.8 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. Materials SF, Cubes or counters, pencil Task Provide materials to the student. Read the problem to the student: Read the number sentence. What is the unknown number that makes the number sentence true? Write the number in the box. 5 - ☐ = 3 2 = 7 - ☐ 9 - ☐ = 1 ☐ 4 - = 0 ☐ 6 = 8 - Continuum of Understanding Developing Answers one or more items incorrectly. Understanding Complete Answers all correctly. Understanding Standards for Mathematical Practice 1. 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 12b Domain Operations and Algebraic Thinking Cluster Work with addition and subtraction equations. Standard(s) 1.OA.8 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. Materials SF, Cubes or counters, pencil Task Provide materials to the student. Read the problem to the student: Read the number sentence. What is the unknown number that makes the number sentence true? Write the number in the box. 5 - ☐ = 3 2 = 7 - ☐ 9 - ☐ = 1 4 - ☐ = 0 6 = 8 - ☐ Continuum of Understanding Developing Understanding Answers one or more items incorrectly. Complete Understanding Answers all correctly. Standards for Mathematical Practice 1. 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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