Comparing Decimals with Models

12.4 Compare Decimals

I can use decimal models, number lines, and place-value charts to compare decimals. I can use <, >, and = to write decimal comparisons.

Multiple Choice

Alexis loves to work out on the treadmill. On Monday, she ran 3.25 miles. On Tuesday, she ran 1.75 miles. On Wednesday, she ran 2.65 miles. On Friday, she ran more miles than she did on Tuesday but less than she did on Monday. On what day did Alexis run the shortest distance?

• Monday

• Tuesday

• Friday

• Wednesday

Open Ended

Alexis loves to work out on the treadmill. On Monday, she ran 3.25 miles. On Tuesday, she ran 1.75 miles. On Friday, she ran more miles than she did on Tuesday but less than she did on Monday. What could be the possible amount of miles she ran on Friday?

Multiple Choice

Jacob is going to the market. He wants to walk the route that is the shorter distance. Which of the two routes should Jacob take, red or orange?

• Red

• Orange

Jacob should take the red route.

Compare the distances using the shaded hundredths models. The hundredths model showing 0.74 has fewer hundredths shaded than the hundredths model showing 0.8. The shorter distance is 0.74 km. Jacob should take the red route, which has the shorter distance.

Step it Out

Mia cuts 2.44 pounds of yellow watermelon and 2.41 pounds of red watermelon. Does Mia cut more yellow watermelon or red watermelon?

First, lets put our decimals in a place value chart.

What is something you notice about our chart?

Multiple Choice

So if Mia cuts 2.44 pounds of yellow watermelon and 2.41 pounds of red watermelon., does Mia cut more yellow watermelon or red watermelon?

• red

• yellow

Mia cuts more yellow watermelon.

Compare the decimal number for the weight of the yellow watermelon, 2.44, to the decimal number for the weight of the red watermelon, 2.41. 2.44 > 2.41 so Mia cuts more yellow watermelon.

Multiple Choice

Samera completed 0.4 of her homework. Dante completed 0.26 of the same homework. Who has completed more so far?

• Samera

• Dante

Multiple Choice

Use the hundredths models and the number line to compare the numbers. 0.52 ____ 0.7

• >

• <

• =

Multiple Choice

A cantaloupe has a mass of 1.48 kilograms. A honeydew melon has a mass of 1.41 kilograms. Which piece of fruit has a greater mass?

• Cantaloupe

• Honeydew

Multiple Choice

Ms. Halloran has prepared slides for her students to view under a microscope. Each slide shows a cell or a one-celled organism. Which is largest?

• amoeba

• euglena

• paramecium