Texas Instruments
Texas Instruments: Exponential and Logarithmic Equations
This problem set contains questions about exponential and logarithmic equations for base e, base 10, and any base b. Problems range from simple manipulation to applications, including graphical transformations. Solutions and explanations...
Anne Arundel Community College
Anne Arundel Community College: Math 131: Special Bases
The tutorial examines base 10 and base e. Students learn about the mathematics concepts through examples with detailed solutions.
Khan Academy
Khan Academy: Solve Exponential Equations Using Logarithms: Base 10 and Base E
Solve exponential equations that have 10 or e at the base of the exponential term. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Windstream
Ojk's Precalculus Study Page: Change of Base Formula
An introduction to logarithms with bases other than 10 and e, and how to work with them when solving equations. This tutorial includes lots of examples and exercises with solutions.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Base Ten Bag: Addition [Pdf]
Experimenting with addition. Materials needed :Base 10 blocks (12 tens and 12 ones), paper bag and a die.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Base Ten Bag (Subtraction) [Pdf]
Students are to work with a partner to practice subtraction. Materials needed:Base 10 blocks (9 tens and 9 ones), numeral cards (0-9) and a paper bag.
Science Struck
Science Struck: How to Convert Octal to Decimal
Explains what the four different types of number systems are and what they are used for. Presents the formula used to convert octal numbers into decimals and models how to apply it in two example problems.