The lesson that I am sharing today is comparing in ordering decimals to the thousandths. In previous grade levels, students have compared and ordered decimals using models and they compared and ordered whole numbers using <, >, and =. This standard scaffolds into higher grade where students need to compare and order all rational numbers. Since rational numbers can be converted into decimals if students have a strong foundation and understanding decimals in their value than it will help them with the higher level comparing.
The TEKS this lesson covers says "compare and order decimals to thousandths and represent comparisons using symbols >,<, and =." The common core standard states "students will compare two decimals to thousandths based on meanings of the digit in each place using >, <, and = symbols to record the results of comparisons."
When you work with students comparing in ordering decimals you see what types of misconceptions they have pretty soon in the lesson a lot of students may feel that 0.49 is less than 0.432 because the second number has more digits.
Anytime students are comparing two numbers I like to use a number line. Students have used number lines before and have placed numbers on the number line and I believe it is important for them to be familiar and fluent with how to place numbers on a number line. You can start by providing students with teacher created number lines but I think it is more beneficial for students to eventually create their own number lines. This lesson begins with students looking at a number line and placing numbers on the number line.
You can download the lesson for free here. I left the actual lesson plans in Word form so you can edit it as need.
If you would like any more resources for comparing decimals to come back to this topic for review throughout the year, you can check out these items in my TpT store.
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