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Decimal Values
Comparing Decimals
Rounding Decimals
Expanded Form, Standard Form and Number Names
100

Which numbers have a digit in the ones place that is 1/10 the value of the digit in the tens place?  Choose all that apply.

3,022

9,228

2,404

2,744

6,222

3,022

2,744

6,222

100

Use >, <, or = to compare.


5.090      5.09

=

100

Round 5.027 to the nearest hundredth.

5.03

100

What is four million, six hundred twenty-five thousand, twenty-two in standard form?

4,625,022

200


8.022 is 1/10 of 80.22

Explain why.

The number 8.022 is shifted to the right one place value position from 80.22, therefore it is 1/10 less.

200

Matthew says that this is a true statement.  Is he correct?  If not, explain his misconception (what he misunderstood) and why he is not correct.

2.05 = 2.5

Matthew is incorrect.  Matthew thought that since there was a 0 in the problem, that the decimals had to be equal.  What he did not realize was that the 0 had to be at the end of the deicmal.

If you look at the tenths place, the first decimal has a 0 while the second decimal has a 5.  Therefore, 2.05 < 2.5

200

Round 6.789 to the nearest tenth.

6.8

200

What is the number name for 45,890,563?

forty-five million, eight hundred ninety thousand, five hundred sixty-three.

300
What is the relationship between the 7s in 7.777?
Sample Answer:  Moving left, each 7 is 10 times greater than the one next to it.


Moving right, each 7 is 1/10 or 10 times less than the 7 next to it.  

300

Write these decimals in order from least to greatest.

4.09

4.009

4.9

40.9

4.009 ; 4.09 ; 4.9 ; 40.9

300

Round 0.999 to the nearest tenth.

1.0

300

What is (4 x 102) + (8 x 101) + (2 x 1/10) + (7 x 1/1000) in standard form?

480.207

400

Complete the sentences to make true statements.

1.  0.09 is 10 times __________

2.  9 is 100 times ___________

3.  0.9 is 1/100 of ________

1.  0.009

2.    0.09

3.    90


400

Put these decimals in order from greatest to least.  

8.45

8.5

8.045

8.445

8.5 ; 8.45 ; 8.445 ; 8.045

400

A grocery store bill was $234.89.  Pauline said that round to the nearest whole, she spent about $234.  Is she correct?  Why or why not?

Pauline is incorrect.  The 8 in the tenths place would change the 4 in the ones place to a 5, making it $235.

400

Write (4 x 1000) + (5 x 100) + (8 x 10) + (3 x 1/10) in standard from.

4,580.3

500
Rutherford High School has 6,000 students.  Porthill High School has 1/10 as many students as Rutherford High School.  How many students are at Porthill High School?

600 students

500

Sally says that 8.29 is greater than 8.5 because 29 is a greater number than 5.  Is she correct?  If not, please explain.

She is not correct.  If you compare the tenths place, you can see that 2 is less than 5, so 8.5 is the greater decimal.  

or

She is not correct.  If you add a 0 to the end of each decimal, you can compare 29 and 50 and see that 29 is less than 50.  Therefore 8.5 is the greater decimal.

500
A decimal rounded to the nearest hundredth is 7.18.  What numbers could we possibly have started with that end up rounding to 7.18?  List 3

Possible answers:

7.180           7.175

7.181           7.176

7.182           7.177

7.183           7.178

7.184           7.179

7.184           


500

The weight of a paperback book is 2.045 ounces.  What is this written in expanded form?  Write it out using fractions, not decimals.

(2 x 1) + (4 x 1/100) + (5 x 1/1000)