# Playlists: Operations & Algebraic Thinking

## 2.OA.1-2.OA.1

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.1

### Solving Word Problems

This playlist contains three games that will help students practice solving addition and subtraction word problems.Whole Class/ Small Group::Thinking Blocks: Model Word Problems Addition and Subtraction (Math Playground):  This activity walks students through solving a word problem by using thi...

Standards: 2.OA.1

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.1

## 2.OA.2-2.OA.2

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

These addition games require quick thinking and repetition of facts by students, and may be played independently.Fish of Lake Mathatobie: Addition:  Students must catch the fish that displays the correct sum of the equation shown.  This is a continuous, untimed game. (Sums 1-20) Are You A ...

Standards: 2.OA.2

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

## 2.OA.3-2.OA.4

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 2s; 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.

### Odd or Even

This playlist contains three activities that will help students practice understanding and identifying odd and even numbers.Students must determine if a number is odd or even in order to continue playing the following games:Fruit Shoot Odd Even (Sheppard Software)Jelly Diving (Fuel the Brain)Monkey ...

Standards: 2.OA.3