Place value and decimals

To really understand how decimal numbers work, we need a deep understanding of place value. The big picture goal of these tutorials is to connect decimal place value to the idea of multiplying by 10.

Learn how to write a decimal like 3.14 in expanded form (3 + 0.1 + 0.04).

Learn how to write decimals like 3.14 in words as "three and fourteen hundredths".

Learn how to round decimal numbers to specific place values. For example, round 3.14159 to the nearest hundredth as 3.14.

Learn how exponents are a simpler way to write something like 10x10x10.

For a number like 34.135, learn how to compare the 3 in the tens place to the 3 in the hundredths place.

Let's tackle some more challenging problems that stretch our understanding of decimal place value. These problems involve regrouping place values in interesting ways.