# Alien Math

### Description

You have made contact with aliens from another galaxy! To establish good inter-species relations, you offer to help the alien students with their math homework. However, it becomes clear that they are not using the base 10 number system that you are familiar with. Can you figure out how their number system works well enough to help the alien students with their homework?

5 minutes

### Activity Time

60 minutes to introduce the Alien Math Homework activity. The full unit can last 5 to 10 class sessions.

### Topics

• Base ten number system
• Number systems with other bases

• handouts
• pencils

### Prerequisites

• Base 10 number system
• Standard addition and subtraction algorithms

• Standard multiplication and division algorithms
• Algorithms with fractions and decimals

### Related Concepts

• Divisibility tests

### Credits

NASA's Voyager webpage at http://voyager.jpl.nasa.gov/spacecraft/goldenrec.html

### Author

Amanda Katharine Serenevy

### National Common Core Standards

 4.NBT.2 Read, write, and compare multi-digit whole numbers using base-ten numerals, number names, and expanded form. 4.NBT.4 Fluently add and subtract multi-digit whole numbers using the standard algorithm. 5.NBT.5 Fluently multiply multi-digit whole numbers using the standard algorithm. 6.NS.2 Fluently divide multi-digit numbers using the standard algorithm.
Riverbend Community Math Center
hello@riverbendmath.org
http://riverbendmath.org
(574) 339-9111
This work placed into the public domain by the Riverbend Community Math Center.