Second Grade Operations and Algebraic Thinking

One and two step word problems, addition of objects in sets and able to fluently solve simple addition and subtraction.  Just click on the blue links to display or print pdfs.
Standards

Practice Pages
Represent and solve problems involving addition and subtraction - Cluster 1

Standard 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 Objects

Answers 2.OA.2.a


Subtraction Word Problems

Answers 2.OA.2.b

Add and subtract within 20 - Cluster 2

Standard 2.OA.2:  Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
Add 1s

Answers 2.OA.2.a


Subtract 2s

Answers 2.OA.2.b
Work with equal groups of objects to gain foundations for multiplication - Cluster 3

Standard 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 2s; write an equation toexpress an even number as a sum of two equal addends.
Odd-Even Objects

Answers 2.OA.3.a


Even Equations

Answers 2.OA.3.b
Standard 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 sumof equal addends.
Array Equations

Answers 2.OA.4.a

Array Equations

Answers 2.OA.4.b