Menu
Sign In
Sign In
Password
Sign In
Forgot your Password?
New to Sophia?
Create an Account
Online College Courses for Credit
Business
Accounting
New
Business Law
Developing Effective Teams
Introduction to Business
New
Principles of Finance
Project Management
English and Communication
New
Communication at Work
Conflict Resolution
English Composition I
New
English Composition II
Foundations of English Composition
Public Speaking
The Essentials of Managing Conflict
Visual Communications
Humanities
Ancient Greek Philosophers
Approaches to Studying Religions
Art History I
New
Art History II
Introduction to Ethics
Math and Science
College Algebra
Environmental Science
Foundations of College Algebra
Foundations of Statistics
Human Biology
Introduction to Information Technology
Introduction to Statistics
Social Science
Introduction to Psychology
Introduction to Sociology
Macroeconomics
Microeconomics
U.S. History I
U.S. History II
Other Courses
College Readiness
Or
Close Popup
>
Mathematics
>
Basic Mathematics
>
Basic Number Operations
>
Adding with an Unknown
+
Previous
Adding Three and Four Digit Numbers
Next
Adding with Decomposition
Adding with an Unknown
Adding with an Unknown
Learn this and go on to
Adding with Decomposition
6
Tutorials That Teach Adding with an Unknown
Take Your Pick:
Adding with an Unknown
Author:
JenniferSampogna
Views:
3130
Rating:
(3)
Adding with an Unknown
Author:
ChristinaPease
Views:
2859
Rating:
(11)
Adding with an Unknown
Author:
Madeleine
Views:
1894
Rating:
(1)
Adding with an Unknown
Author:
Kevin Kriescher
Views:
2025
Rating:
(0)
Adding with an Unknown
Author:
RobertOB
Views:
1558
Rating:
(0)
Adding with an Unknown
Author:
Brian Hill
Views:
1820
Rating:
(0)
