Unit 1 Review

Understanding Place Value

100

Which two numbers have an 8 in the hundredths place.

508.198    627.189    842.873    618.851      180.081

627.189 and 180.081

200

Place a decimal point between two digits in the number below so that the number has a 7 in the hundredths place.

6 7 7 0 6

6.7706

300

Which number has a digit with a value of 8/1000

6.481      7.825       9.884      9.048          8.725

9.048

400

The value of the digit 8 in the number 4,582 is _______________ the value of the digit 8 in the number 1,208.

10 times

500

Jack has a string that is 28 centimeters long and another string that is 56 millimeters long. Find the total length of Jack’s strings, in centimeters.

33.6 centimeter

Rounding Decimals

100

Round 27.499 to the nearest whole number.

27

200

Round 32.051 to the nearest whole number

33

300

Round 750.451 to the nearest hundredth

750.45

400

Round 123.456 to the nearest tenth

123.5

500

Round 305.599 to the nearest hundredth

305.60

Adding and Subtracting decimals

100

Add. 

56.71 + 3.28

59.99

200

Add. 

4.68 + 7.63 = _______________

12.31

300

Add. 

314 + 8.73 = _______________

322.73

400

Subtract. 

67.3 – 5.42 =__________

61.88

500

Subtract

18 – 2.99 =

15.01

Comparing Decimals

100

4.68 ______ 4.678

>

200

9.4 _____ 9.044

>

300

Compare.

7.009 ______ 7.01

<

400

Fill in the blanks with the given numbers to make true comparisons.

4.994, 4.99, 4.949, 4.499

________ < ________ < ________ < ________

4.499 < 4.949 < 4.99 < 4.994

500

Fill in the blanks with the given numbers to make true comparisons.

5.687, 5.786, 5.768, 5.678

________ < ________ < _________ < ________

5.678 < 5.687 < 5.768 < 5.786

Expanded Form

100

Write in standard from: 

(3 x 1,000) + (9 x 10) + (6 x 1) + (2 x 1/100) + ( 7 x 1/1,000)

3,096.027

200

Write in Standard Form:

(5 x 1) + (9 x 1/10) + (4 x 1/100) + (2 x 1/1000)

5.942

300

Write the number in standard form.

(7 x 1) + (7 x 1/10) + (6 x 1/100) + (5 x 1/1000)

7.765

400

Write in expanded form: 

3,921.345 = ( _____ × _____ ) + ( _____ × _____ ) + ( _____ × _____ ) + ( _____ × _____ ) + ( _____ × _____ ) + ( _____ × _____ ) + ( _____ × _____ )

( 3 x 1,000) + (9 x 100) + (2 x 10) x (1 x 1) + (3 x 1/10) + (4 x 1/100) + (5 x 1/1,000)

500

Fill in the blanks

4 , ___ 7 ___ . ___ 3 ___ = ( _____ × 1,000 ) + ( 8 × 100 ) + ( _____ × 10 ) + ( 9 × 1 ) + ( 1 × 1/10 ) + ( _____ × 1/100 ) + ( 5 × 1/1,000 )

4,879.135