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

24 Lesson(s)

### The Neighbors of Doubles

Pepperell, MA
Environment: Rural

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Favorites (33)

Resources (14)

Reflections (1)

### Making a Ten

Pepperell, MA
Environment: Rural

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Favorites (17)

Resources (15)

Reflections (1)

### Thinking Addition Facts to 18 to Subtract

2nd Grade Math » Unit: The Action of Subtraction
2nd Grade Math » Unit: The Action of Subtraction
Pepperell, MA
Environment: Rural

Big Idea:

#### Students apply their understanding of addition to solve related subtraction problems.

Standards:

Favorites (13)

Resources (13)

Reflections (1)

2nd Grade Math » Unit: The Action of Subtraction
2nd Grade Math » Unit: The Action of Subtraction
Pepperell, MA
Environment: Rural

Big Idea:

Standards:

Favorites (14)

Resources (11)

Reflections (1)

### Double Trouble

Pepperell, MA
Environment: Rural

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Favorites (8)

Resources (14)

Reflections (1)

### Subtracting Doubles

2nd Grade Math » Unit: The Action of Subtraction
2nd Grade Math » Unit: The Action of Subtraction
Pepperell, MA
Environment: Rural

Big Idea:

Standards:

Favorites (8)

Resources (16)

Reflections (1)

### Go Fishing for a Ten

Pepperell, MA
Environment: Rural

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Favorites (15)

Resources (12)

Reflections (1)

### Make a Ten, Subtraction Style

2nd Grade Math » Unit: The Action of Subtraction
2nd Grade Math » Unit: The Action of Subtraction
Pepperell, MA
Environment: Rural

Big Idea:

#### The big idea of this lesson is that some subtraction facts can be solved by subtracting from the larger number an amount to get ten and then subtracting the remaining amount.

Standards:

Favorites (6)

Resources (16)

Reflections (1)

2nd Grade Math » Unit: The Action of Subtraction
2nd Grade Math » Unit: The Action of Subtraction
Pepperell, MA
Environment: Rural

Big Idea:

Standards:

Favorites (7)

Resources (14)

Reflections (1)

### Sets of Things

York, ME
Environment: Suburban

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Favorites (2)

Resources (12)

Reflections (1)

### The Recipe for a Great Word Problem

Pepperell, MA
Environment: Rural

Big Idea:

#### The big idea of this lesson is to have students write their own word problems to help them have a better understanding of mathematical operations, as they relate to real world scenarios.

Standards:

Favorites (74)

Resources (14)

Reflections (1)

Pepperell, MA
Environment: Rural

Big Idea:

Standards:

Favorites (7)

Resources (16)

Reflections (1)

### Plus Ten Minus Ten

York, ME
Environment: Suburban

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Favorites (10)

Resources (13)

Reflections (2)

### 10 and Some More

1st Grade Math » Unit: Complements of 10 and 20
1st Grade Math » Unit: Complements of 10 and 20
Waitsfield, VT
Environment: Suburban

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Favorites (6)

Resources (20)

Reflections (1)

### Counting Up to Solve Problems

York, ME
Environment: Suburban

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Favorites (13)

Resources (13)

Reflections (1)
Common Core Math