Multiplying or Dividing a Decimal Number by 10, 100, or 1,000

Conditional probability
When we compute the probability of event $F$ assuming that the event $E$ has already occurred, we call this...
Modulo-m Systems
If m is an integer greater than 1, then a modulo-m system consists of the numbers 0,1,2,…,m−1. Counting and...
Understanding Non-Base 10 Systems
In base-10, place values correspond to powers of 10, for example: In base-b, place values correspond to powers of...
Using Napier’s Bones to Multiply
The seventeenth century saw the beginning of the development of instruments to aid calculation, making the process gradually more...
The Mayan Numeration System
The Maya Indians had a numeration system based on the number 20. It used patterns of dots and bars...