NY-2.OA: Operations and Algebraic Thinking

Operations and Algebraic Thinking

NY-2.OA.1aUse addition and subtraction within 100 to solve one-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions.NY-2.OA.1bUse addition and subtraction within 100 to develop an understanding of solving two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions.NY-2.OA.2aFluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction; and creating equivalent but easier or known sums.NY-2.OA.2bKnow from memory all sums within 20 of two one-digit numbers.NY-2.OA.3aDetermine whether a group of objects (up to 20) has an odd or even number of members.NY-2.OA.3bWrite an equation to express an even number as a sum of two equal addends.NY-2.OA.4Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns. Write an equation to express the total as a sum of equal addends.
Goblins

1-on-1 AI tutoring aligned to NY-2.OA. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

Free for teachers, forever →