Lesson 5: Comparing Decimals
Getting Started
Materials: fine point dry-erase markers (kit), laminated decimal grid (kit)
Using the laminated decimal grid and a dry-erase marker, show 0.4 on the Tenths and the Hundredths grids. Keep in mind that both grids should show the same amount, so they should look the same. How many spaces should you color on the Tenths grid? How many should you color on the Hundredths grid?
You should have colored 4 spaces on the Tenths grid and 40 spaces on the Hundredths grid. Now, use the grids to do the following, and write your numbers on a piece of paper. Keep in mind that when you showed 0.4 on both the Tenths and Hundredths grids, you showed that 0.4 is the same as 0.40.
You should have colored 4 spaces on the Tenths grid and 40 spaces on the Hundredths grid. Now, use the grids to do the following, and write your numbers on a piece of paper. Keep in mind that when you showed 0.4 on both the Tenths and Hundredths grids, you showed that 0.4 is the same as 0.40.
- Name 2 decimals to the tenths place that are greater than 0.4.
- Name 2 decimals to the tenths place that are less than 0.4.
- Name 2 decimals to the hundredths place that are greater than 0.4.
- Name 2 decimals to the hundredths place that are less than 0.4.
Once you finish writing all of the numbers, share them with a parent.
Stuff You Need
- fine point dry-erase markers (kit)
- laminated decimal grid (kit)
- laminated decimal place value chart (kit)
- number cards (kit)
Ideas to Think About
- How do you read and write decimal numbers?
- How can you compare decimals?
Skills
- Read, write, and compare decimals to thousandths
- Read and write decimals to thousandths using base-ten numerals, number names, and expanded form
- Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons
Introducing the Lesson
In this lesson, your child will compare decimals to the thousandths place using different methods, including decimal grids and a place value chart. Be ready to listen to his answers to the following:
- Name 2 decimals to the tenths place that are greater than 0.4. (Examples: 0.5, 0.7)
- Name 2 decimals to the tenths place that are less than 0.4. (Examples: 0.3, 0.1)
- Name 2 decimals to the hundredths place that are greater than 0.4. (Examples: 0.56, 0.48)
- Name 2 decimals to the hundredths place that are less than 0.4. (Examples: 0.35, 0.28)