## Friday, April 13, 2012

### Interactive Whiteboard Lesson - Comparing and Ordering Decimals

Comparing and Ordering Decimals
Interactive Whiteboard Lesson
Resource type: SMART Notebook lesson
Subject: Mathematics

Comparing Decimals
If there are two decimal numbers we can compare them.  One number is either greater than, less than or equal to the other number.
Therefore, when decimals are compared start with tenths place and then hundredths place, etc. If one decimal has a higher number in the tenths place then it is larger than a decimal with fewer tenths. If the tenths are equal compare the hundredths, then the thousandths etc. until one decimal is larger or there are no more places to compare. If each decimal place value is the same then the decimals are equal.

Ordering Decimals
We can order decimals from least to greatest or we can order from greatest to least.
Let’s try an example:

Order 12, 13.8, 12.65, and 12.01 from least to greatest.

First, line up the decimal points.
Next, annex zeros so that each number has the same number of decimal places
Finally, use place value to compare the decimals. Always start from the left.
So, the answer is 12, 12.01, 12.65, 1nd 13.8

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