Common Core State Standards

# CCSS.MATH.CONTENT.2.OA.B.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.

32 of 101 teaching resources for those 'aha' moments

### Subtraction Strategies – Worksheet

A worksheet to use when assessing your students’ knowledge of subtraction strategies.

2 pages Grades: 2 - 3

### Split Strategy for Subtraction – Interactive PowerPoint

An 11-slide, editable teaching presentation that focuses on the split strategy for subtraction.

11 pages Grades: 2 - 3

### Math Mazes – Making Ten

A set of mazes where students find missing addends to solve the maze.

6 pages Grades: 1 - 2

### Color by Number – Repeated Addition

An engaging activity to prepare students for understanding the concept of multiplication.

2 pages Grades: 2 - 3

### Counting On 2 and 3 - Number Facts Board Game

A fun, hands-on game students can play to practice the 'Counting On 2 and 3' addition strategy.

3 pages Grades: 1 - 2

### Subtraction Dog – Worksheet

A set of superb subtraction dog worksheets.

6 pages Grades: 1 - 3

### Decomposing to a Ten – Interactive PowerPoint

A 13-slide, editable teaching presentation focusing the decomposing to a ten subtraction strategy.

13 pages Grades: 2 - 3

### Decorate a Pumpkin - Halloween Game

Practice finding sums up to 12 with this fun Halloween pumpkin game!

2 pages Grades: 1 - 3

### Taking From 10 - Number Facts Board Game

A fun, hands-on game students can play to practice the 'Taking from 10' subtraction strategy.

3 pages Grades: 1 - 2
• #### teaching resource

A PowerPoint for students to interact with when practicing addition facts.

6 pages Grades: 1 - 2

### Doubles Subtraction - Number Facts Board Game

A fun, hands-on game students can play to practice the subtraction strategy 'Doubles Subtraction'.

3 pages Grades: 1 - 2

### Counting On 1 - Number Facts Board Game

A fun, hands-on game students can play to practice the 'Counting On 1' addition strategy.

3 pages Grades: 1 - 2

### Making Ten Cut and Paste Worksheet

A cut and paste worksheet to practice finding the missing addend when making ten.

3 pages Grades: K - 2

### Missing Part Path

A worksheet to use when learning about various subtraction strategies.

2 pages Grades: 2 - 3

### Missing Addend Picture Puzzle – Level 1

Solve the missing addition sentence by matching the addend with its equation, completing the puzzle.

3 pages Grades: 1 - 2

### Compatible Numbers for Subtraction – Interactive PowerPoint

A 13-slide, editable teaching presentation that focuses on using compatible numbers as a subtraction strategy.

13 pages Grades: 2 - 3
• #### teaching resource

A set of differentiated addition worksheets.

6 pages Grades: 1 - 3

### Jump Strategy for Subtraction – Interactive PowerPoint

An 11-slide, editable teaching presentation that focuses on the jump strategy.

11 pages Grades: 2 - 3

### Double Dinos - Using Doubles Facts to Add Near Doubles Worksheet

Practice the “near doubles” addition strategy to solve addition problems to 20.

### Compensation Strategy for Subtraction – Interactive PowerPoint

A 16-slide, editable PowerPoint that focuses on the compensation strategy for subtraction.

16 pages Grades: 2 - 3
• #### teaching resource

A set of 15 match-up cards to scaffold work with addition word problems.

8 pages Grades: 2 - 3

### Making 10 - Number Facts Board Game

A fun, hands-on game students can play to practice the 'Making 10' addition strategy.

3 pages Grades: 1 - 2

### Fact Family Find and Flip - Addition and Subtraction Up to 20

Addition and subtraction game cards demonstrating the relationship between fact families.

1 page Grades: 1 - 2

### Counting Back 2 and 3 - Number Facts Board Game

A fun, hands-on game students can play to practice the 'Counting Back 2 and 3' subtraction strategy.

3 pages Grades: 1 - 2

### The Mathematical Easter Egg Hunt

A differentiated Easter egg hunt activity for mathematics.

11 pages Grades: 2 - 5

### Color by Number – Repeated Addition and Multiplication

An engaging activity for students to connect repeated addition with multiplication.

2 pages Grades: 2 - 3

### Near Doubles - Number Facts Board Game

A fun, hands-on game students can play to practice the 'Near Doubles' addition strategy.

3 pages Grades: 1 - 2

### Cover Up! - Addition Facts Game

Develop a love of addition facts with this multiplayer Valentine’s Day board game.

1 page Grades: 1 - 2

### Subtraction Strategies Using Addition Worksheet

Use addition to solve subtraction problems with this worksheet.

2 pages Grades: 1 - 2

### Ten is a Match! - Memory-Style Game

Practice matching two numbers that add up to 10 with this set of 24 number cards.

9 pages Grades: K - 2

### Friends of 20 – Addition Match-up Activity

A set of 40 matching cards to explore the number combinations of 20.

11 pages Grades: 1 - 2

### Doubles - Number Facts Board Game

A fun, hands-on game students can play to practice the doubles addition strategy.

3 pages Grades: 1 - 2