This is a complete lesson with instruction and varied exercises, explaining how the place value system works with decimals that have one decimal digit, and how to write such decimals in expanded form.

Did you know that the position of numbers in relation to the decimal point changes its value? On this site learn about decimals place value.

Practice writing decimal numbers in word form and number form. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Explore a brief history of mathematics in Mesopotamia through the Babylonian Base 60 number system. This video focuses on how a base 60 system does not use fractions or repeating decimals, some of the advantages of a base 60 system, and...

Lesson includes a video & examples showing the common shortcut for multiplying & dividing decimals by powers of ten. [7:59] Provides exercises and word problems for practice.

Solve word problems by comparing decimals Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Rounding calculator teaches how to round numbers up or down to any decimal place. Choose ones to round a number to the nearest dollar. Choose hundredths to round an amount to the nearest cent.