## Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

12 Lesson(s)

### Adding and Subtracting Multiples of Ten

1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
Waitsfield, VT
Environment: Suburban

Big Idea:

#### Students will apply the idea of adding or subtracting ten to a number by adding or subtracting multiple groups of ten from a number.

Standards:

Favorites (20)

Resources (22)

Reflections (1)

1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
Waitsfield, VT
Environment: Suburban

Big Idea:

Standards:

Favorites (2)

Resources (14)

Reflections (1)

### Speed Date!

New Orleans, LA
Environment: Urban

Big Idea:

Standards:

Favorites (5)

Resources (20)

Reflections (1)

### How Many On My Plate? (Addition)

1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
Waitsfield, VT
Environment: Suburban

Big Idea:

Standards:

Favorites (5)

Resources (24)

Reflections (1)

### Subtract Tens

Lakeland, FL
Environment: Urban

Big Idea:

Standards:

Favorites (12)

Resources (12)

Reflections (1)

### How Many On My Plate? (Subtraction)

1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
Waitsfield, VT
Environment: Suburban

Big Idea:

Standards:

Favorites (4)

Resources (19)

Reflections (1)

### End Of Unit Assessment

1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
Waitsfield, VT
Environment: Suburban

Big Idea:

Standards:

Favorites (4)

Resources (20)

Reflections (1)

### The Wheels on the Bus

1st Grade Math » Unit: Base 10 Bonanza
1st Grade Math » Unit: Base 10 Bonanza
New Orleans, LA
Environment: Urban

Big Idea:

Standards:

Favorites (5)

Resources (16)

Reflections (1)

### Will you be my Valentine?

New Orleans, LA
Environment: Urban

Big Idea:

Standards:

Favorites (3)

Resources (12)

### Mid Unit Check In

1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
1st Grade Math » Unit: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
Waitsfield, VT
Environment: Suburban

Big Idea:

#### This task will offer a challenging activity and will also act as a piece of formative assessment as you look deeper into how well they can add or subtract ten from a number and plan your instruction from here.

Standards:

Favorites (2)

Resources (23)

Reflections (1)

1st Grade Math » Unit: Place Value
Oklahoma City, OK
Environment: Urban

Big Idea:

#### My students need to apply their understanding of place value to properties of addition and subtraction. We continue to build that understanding today by connecting to subtraction facts they already know well.

Standards:

Favorites (1)

Resources (16)

Reflections (1)

1st Grade Math » Unit: Place Value
Oklahoma City, OK
Environment: Urban

Big Idea:

Standards:

Favorites (3)

Resources (16)

Reflections (1)
Common Core Math