Launching Into Expressions and Equations

Using The Tool

Launching Into Expressions and Equations is an interactive tool that illustrates how expressions and equations are used to help solve problems in the real world. Variables and scientific notation are some of the many types of math that contribute to space exploration!

Use this tool to explore how variables can be essential to completing a journey to Mars and how scientific notation facilitates life aboard the International Space Station.

Definitions

Expression: A mathematical phrase including numbers, operators, and/or variables. Examples:
1. 7
2. b + 2
3. 40xy
Equation: A statement that shows two equal expressions. Examples:
1. 23 + 7 = 30
2. 9 = 9
Algebraic Equation: An equation that includes variables. Examples:
1. 0.8 + c = 40
2. 6h = g
Variable: An unknown or changing value
Scientific Notation: A way of writing numbers as an expression that multiplies a constant by a power of 10. These expressions can be used within equations, in written word problems, and even in conversation. This style eliminates writing strings of many zeroes as placeholders in numbers with many digits.

Ideas for use

Talk It Out: Explore the Bonus Mission Tasks that appear after each question. Discuss with peers and share your thinking to arrive at a conclusion.
Go Further: Research space exploration. What other situations require knowledge of mathematical expressions and equations? What other types of math and science are needed as well?
Read On: The novel The Martian by Andy Weir tells the story of an astronaut stranded on Mars and his fight to survive. Hint: He relies on his knowledge of math and science!
Beyond Space: What other jobs can you think of where knowledge of expressions and equations is important?

Browser Compatibility

Firefox 45+
Safari 9+
Chrome 50+
Internet Explorer 11
Mobile: Safari on iOS 9; Chrome on Android 5

Presented by