Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ - 3, 6 + 6 = _.

29 Lesson(s)

1st Grade Math » Unit: Working with Numbers, Operations, and Story Problems
1st Grade Math » Unit: Working with Numbers, Operations, and Story Problems
Waitsfield, VT
Environment: Suburban

Big Idea:

Standards:

Favorites (41)

Resources (15)

Reflections (1)

Missing Numbers

Lakeland, FL
Environment: Urban

Big Idea:

Standards:

Favorites (13)

Resources (12)

Reflections (1)

Seven Apples and Bananas

1st Grade Math » Unit: Building Numbers
1st Grade Math » Unit: Building Numbers
Waitsfield, VT
Environment: Suburban

Big Idea:

Standards:

Favorites (14)

Resources (16)

Reflections (1)

If you give a mouse a cookie...

1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
New Orleans, LA
Environment: Urban

Big Idea:

Standards:

Favorites (14)

Resources (17)

Reflections (1)

Using 3 or More Addends to Make a Meal

Gilbert, IA
Environment: Rural

Big Idea:

Using the theme of a very YUMMY Thanksgiving meal, students will plan their own meal and figure out the cost of it.

Standards:

Favorites (12)

Resources (14)

Reflections (1)

1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
New Orleans, LA
Environment: Urban

Big Idea:

Standards:

Favorites (13)

Resources (17)

Reflections (1)

Identify Related Facts - Day 2 of 2

Lakeland, FL
Environment: Urban

Big Idea:

Standards:

Favorites (13)

Resources (12)

Reflections (1)

Balancing Act

1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
New Orleans, LA
Environment: Urban

Big Idea:

Standards:

Favorites (13)

Resources (19)

Reflections (2)

Counting On

Gilbert, IA
Environment: Rural

Big Idea:

Standards:

Favorites (7)

Resources (12)

Reflections (1)

Combinations, Day 1

1st Grade Math » Unit: Working with Numbers, Operations, and Story Problems
1st Grade Math » Unit: Working with Numbers, Operations, and Story Problems
Waitsfield, VT
Environment: Suburban

Big Idea:

Standards:

Favorites (9)

Resources (14)

Reflections (1)

The Circus Problem

1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
New Orleans, LA
Environment: Urban

Big Idea:

Students connect to stories! In this lesson students work to solve a sad clown's problem by solving a start unknown story problem!

Standards:

Favorites (8)

Resources (21)

Reflections (2)

Oklahoma City, OK
Environment: Urban

Big Idea:

Standards:

Favorites (4)

Resources (13)

Reflections (1)

Bicycle Shop Orders

1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
New Orleans, LA
Environment: Urban

Big Idea:

Standards:

Favorites (4)

Resources (15)

Reflections (1)

Pick a Card, Any Card!

1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
1st Grade Math » Unit: Missing Parts: Unknowns in All Positions
New Orleans, LA
Environment: Urban

Big Idea:

Standards:

Favorites (2)

Resources (19)

Reflections (1)

Is It True or Is It False?

1st Grade Math » Unit: The Number 10 and the Addition and Subtraction Concept
1st Grade Math » Unit: The Number 10 and the Addition and Subtraction Concept
Waitsfield, VT
Environment: Suburban

Big Idea:

Standards:

Favorites (14)

Resources (25)

Reflections (1)
Common Core Math