Number Factory

Number Factory: Background Information

SummaryFour numbers presented in a factory. With these numbers and the operations +, -, x, and : try to make a calculation that has the given number as answer. You can also use brackets in your calculation.
This applet is similar to the applet Number Card.
Subjectnumber sense | number, estimation
Age Groupprimary education | middle school (gr. 7-8)
ProgrammerMichiel Doorman
AuthorMichiel Doorman
Versionrevised version
© 2003 - 2012