2nd Grade - Math - 2.OA - Operations and Algebraic Thinking
Represent and solve problems involving addition and subtraction
---------------------------------------------------------------------------------------------------------------------------------
|
2.OA.1
|
Use addition and subtraction within 100 to solve one- and two- step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
|
---------------------------------------------------------------------------------------------------------------------------------
Add and subtract within 20
|
2.OA.2
|
Fluently add and subtract within 20 using mental strategies. By the end of Grade 2, know from memory all sums of two one-digit numbers.
|
---------------------------------------------------------------------------------------------------------------------------------
Work with equal groups of objects to gain foundations for multiplication
|
2.OA.3
|
Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2’s; write an equation to express an even number as a sum of two equal addends.
|
---------------------------------------------------------------------------------------------------------------------------------
|
2.OA.4
|
Use 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.
|
Notebook Files:
Adding with Manipulatives |
---------------------------------------------------------------------------------------------------------------------------------
