Compare Order & Round Decimals Lesson

Compare, Order, and Round Decimals

During this lesson you will learn tricks to comparing and rounding decimals

Poll

Do you know EXACTLY how to compare decimals using <, >, =? Or how to put a list of them in order from least to greatest?

• Can do it quickly. No problems.

• I get some right, some wrong. Some stump me.

• I'm really not sure what comparing decimals means.

COMPARING DECIMALS

Watch the video then answer some questions

Multiple Choice

The BEST trick to comparing decimals is ___________

• Just go with what my gut says

• Whichever one has the greatest numbers is bigger

• Adding zeros to blank spots and think of it as money $$$

Multiple Select

It takes Mrs. Bloom 0.56 seconds to walk to the end of the hall. It takes Mrs. Boyington 0.65 seconds to walk to the end of the hall. Who walks to the end of the hall faster?

• Mrs. Boyington 0.65>0.56

• Mrs. Bloom 0.65>0.56

• Mrs. Boyington 65/100 > 56/100

• Mrs. Bloom 65/100> 56/100

Multiple Choice

Which number belongs in the empty box on the number line in the picture?

• 4.69

• 4.601

• 4.614

• 4.7

Multiple Select

In Rexburg there was 0.79 inches of snow fall. In Idaho Falls there was 0.75 inches of snow fall. Which city had more snow fall?

• Idaho Falls 75/100> 79/100

• Idaho Falls 0.79> 0.75

• Rexburg 0.79> 0.75

• Rexburg 79/100> 75/100

Multiple Choice

Order the following decimals from least to greatest
0.54  0.5   0.85   0.8 

• 0.5  0.54  0.8  0.85
• 0.54  0.5  0.8  0.85
• 0.85  0.8  0.5  0.54
• 0.8  0.5  0.85  0.54

Multiple Choice

Billy ate 0.42 pounds of gummy bears. Bob ate 0.24 pounds of gummy bears. Who are more gummy bears?

• Billy

• Bob

Multiple Choice

Jannet measures and cut 3 pieces of ribbon to wrap gifts. The lengths of the ribbons she cut are shown in the table below.

Ribbon 1 - 66.23 mm

Ribbon 2 - 66.326 mm

Ribbon 3 - 63.623 mm

Which is NOT a correct comparison of the lengths of the 3 ribbons?

• Ribbon 2 > Ribbon 1

• Ribbon 3 < Ribbon 1

• Ribbon 2 > Ribbon 3

• Ribbon 1 = Ribbon 3

Multiple Choice

make this a true statement 0.3 ______ 0.32

• 0.3 = 0.32

• 0.3<0.32

• 0.3>0.32

Multiple Select

When would you COMPARE decimals in the real world? Check all that apply.

• Adding the money in a cash drawer

• Determining 1st, 2nd, and 3rd place in a track meat

• Making change from a $20 dollar bill

• Which Target made the most money

• Finding the tomato that weighs the most

Open Ended

What TRICK or SAYING do you use to ROUND decimals?

ROUNDING DECIMALS

This video will show how to round decimals to the nearest whole number, tenth, hundredth (money), thousandth, and so on. Watch then answer some questions.

Multiple Choice

What is $7.8693 rounded to the nearest cent?

• $7.80

• $7.86

• $7.87

• $7.90

Multiple Choice

What is the place value of the number 3 in the number below?

3.46

• ones place

• tenths place

• hundredths place

• hundreds place

Multiple Choice

What is the place value of the number 6 in the number below?

247.167

• tenths

• thousandths

• hundredths

• ones

Multiple Choice

Round 7.4365 to the nearest thousandth.

• 7.436

• 7.446

• 7.45

• 7.437

Multiple Choice

Round $278.49 to the nearest hundred dollars.

• $200.00
• $300.00
• $270.00
• $260.00

Multiple Choice

Round 47.941 to the nearest tenth.

• 47.9
• 48
• 47.91
• 48.1

Multiple Choice

Round 5.592 to the nearest hundredth.

• 5.60
• 5.50
• 6.59
• 5.59

Multiple Choice

Round 1.823 to the nearest whole number.

• 1

• 1.8

• 2

• 2.8

Multiple Choice

Which of the following is true?

• 1.72 rounded to the nearest tenth is 1.7
• 2.62 rounded to the nearest tenth is 2.7
• 3.41 rounded to the nearest whole number is 4
• 10.231 rounded to the nearest hundredth is 10.22