Operations and Algebraic Thinking
Represent and Solve Problems involving Addition and Subtraction
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.
Thinking Blocks- Addition and Subtraction
Thinking Blocks- Modeling Word Problems
Basketball Missing Addends
Card Game Missing Addends
Dream Box
Harcourt School: Algebra
Learning Today-Algebra
Add and Subtract within 20
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.
Alien Addition
Add Like Mad
Basic Addition & Subtraction Facts
Fact Practice
Harcourt: Practice facts
Kidgames: Addition
Number Line Adding and Subtracting Within 20
Soft Schools
Subtraction Practice-Gudli
Work with Equal Groups of Objects to gain Foundations for Multiplication
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.
Dragon Map
Fruit Shoot- Odd and Even
Counting Songs
Crick Web
Odd and Even
Skip Counting
Soft Schools: Odd and Even
Skip Counting
Skip Counting by 2's, 5's, or 10's
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.
Multiplication Sentences
Multiply with Repeated Arrays
Represent and Solve Problems involving Addition and Subtraction
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.
Thinking Blocks- Addition and Subtraction
Thinking Blocks- Modeling Word Problems
Basketball Missing Addends
Card Game Missing Addends
Dream Box
Harcourt School: Algebra
Learning Today-Algebra
Add and Subtract within 20
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.
Alien Addition
Add Like Mad
Basic Addition & Subtraction Facts
Fact Practice
Harcourt: Practice facts
Kidgames: Addition
Number Line Adding and Subtracting Within 20
Soft Schools
Subtraction Practice-Gudli
Work with Equal Groups of Objects to gain Foundations for Multiplication
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.
Dragon Map
Fruit Shoot- Odd and Even
Counting Songs
Crick Web
Odd and Even
Skip Counting
Soft Schools: Odd and Even
Skip Counting
Skip Counting by 2's, 5's, or 10's
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.
Multiplication Sentences
Multiply with Repeated Arrays