Comparing Decimals: Key Concepts and Techniques

This video tutorial for fifth graders covers lesson 1-5 on comparing decimals. It begins with a recap of class material, explaining how to line up decimal points and compare digits of the same place value. An example using cockroach lengths illustrates the process. The lesson then moves to ordering decimals from least to greatest, providing step-by-step guidance. Students are encouraged to practice with problems, including a 'convince me' section to critique reasoning. The video concludes with instructions for independent practice and further problem-solving.

What is the first step in comparing two decimals?

• Identify the largest number

• Add zeros where necessary

• Compare the first digit

• Align the decimal points

In the example, which cockroach was longer, American or Oriental?

• American

• Oriental

• Both are equal

• Cannot be determined

Why did Valerie incorrectly claim one decimal was greater than the other?

• Confused with whole number comparison

• Did not align the decimals

• Misread the numbers

• Ignored the decimal places

What should you do if there is an empty place in a decimal during comparison?

• Stop the comparison

• Assume it's nine

• Assume it's zero

• Skip the comparison

Which decimal is greater: 0.943 or 0.947?

• 0.943

• 0.947

• Both are equal

• Cannot be determined

How do you determine which number is greater when the digits up to hundredths place are the same?

• Guess based on size

• All numbers are equal

• Compare the first digit

• Compare the thousandths place

What is the correct comparison for 3.692 and 3.697?

• 3.692 > 3.697

• 3.692 < 3.697

• Cannot be determined

• 3.692 = 3.697

What placeholder is used to make decimal places equal for comparison?

• Two

• One

• Zero

• Nine

After completing the independent practice, what should students do?

• Start over

• Take a break

• Show their work to the teacher

• Ignore any mistakes

What is the purpose of using a 'practice buddy' in learning decimals?

• To compete

• To learn collaboratively

• To have fun

• To check answers