Make a Ten
Topics
 Place Value
 Addition
 Subtraction
 Arithmetic
Description
Add numbers by making tens. Break apart and combine numbers while focusing on place value. Use the adding screen to add any two numbers. Use the game screen to apply your makeaten strategies!
Sample Learning Goals
 Improve understanding of place value by using different sizes of papers for ones, tens, and hundreds.
 Develop mental math strategies when taking apart and putting together numbers.
 Use the “make a ten” strategy when counting and doing addition.
 Develop a mental model of the basic properties of numbers including commutativity, associativity, and closure.
Standards Alignment
Common Core  Math
Teacher Tips
Overview of sim controls, model simplifications, and insights into student thinking ( PDF ). 
TeacherSubmitted Activities
Title  Authors  Level  Type  Subject  

CCSS Math Alignment with Sims  Amanda McGarry  MS HS K5 
Other  Mathematics  
DoubleDigit Addition  Susan O'Reilly  K5  Guided  Mathematics  
Standard Adding Algorithm Demonstration  Beth Stade  K5  Demo  Mathematics  
Intervention and Targeted Practice Tips  Beth Stade  K5  Other Discuss 
Mathematics  
Number Talks  Beth Stade  K5  Other HW Demo 
Mathematics  
Preguntas de razonamiento para todas las simulaciones HTML5  Diana López  UGAdv Grad K5 HS MS UGIntro 
Discuss HW 
Physics Chemistry Mathematics Astronomy 

Operações Aritméticas Fundamentais  Georgyana Cidrão; Francisco Régis Vieira Alves  K5  Guided Lab 
Mathematics  
Quadro Valor e Lugar  QVL  Carolina Silveira  MS  Lab  Mathematics 
The new HTML5 sims can run on iPads and Chromebooks, as well as PC, Mac, and Linux systems.
iPad:
iOS 11+ Safari
iPad compatible sims
Android:
Not officially supported. If you are using the HTML5 sims on Android, we recommend using the latest version of Google Chrome.
Chromebook:
Latest version of Google Chrome
The HTML5 and Flash PhET sims are supported on all Chromebooks.
Chromebook compatible sims
Windows Systems:
Microsoft Edge and Internet Explorer 11, latest version of Firefox, latest version of Google Chrome.
Macintosh Systems:
macOS 10.9.5+, Safari 9+, latest version of Chrome.
Linux Systems:
Not officially supported. Please contact phethelp@colorado.edu with troubleshooting issues.
Design Team  Thirdparty Libraries  Thanks To 


