Math

4TH Grade STAAR Review

4.2B/4.2E

Discuss the following question with your groups

​Numberock Representing Decimals

Vocabulary

• Decimals: numbers between whole numbers with one or more digits to the right of the decimal point that represent part of a whole

• Decimal point: a dot separating the ones and the tenths place in a decimal number, read as “and”

• Hundredth: One of 100 equal parts of a whole; one whole is composed of 100 hundredth

• Tenth: One of ten equal parts of a whole; one tenth is composed of ten hundredths; one whole is composed of ten tenths

• Digit: any one of ten symbols used to write numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
• Expanded notation: a number represented as the sum of the product of each digit within a number multiplied by the value of each digit’s place value position [e.g., 6,870 as (6 x 1,000) + (8 x 100) + (7 x 10)

•Place Value the position of a digit in a number that is used to determine the value of a digit

Dropdown

Refuel your brain. . . . . . 3…2…1…GO!

1. Draw a ​

Select answer

2. Label the chart and anchor your decimal.

3. Put the numbers in your chart.

Remember expanded ​

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​ uses ​

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to represent the value of the digit!

Math Response

Check your sensors:

Represent the following number in expanded notation. 5,236.02

Type answer here

Correct Answer: \left(5\times1000\right)+\left(2\times100\right)+\left(3\times10\right)+\left(6\times1\right)+\left(2\times0.01\right)

Deg^°

Rad

Multiple Choice

Camila buys a ham that weighs 23.89 pounds. Which of the following is true about the number 23.89?

• The digit 2 has a value of 2,000.

• The digit 8 has a value of 0.08.

• The digit 9 has a value of 0.09.

• The digit 3 has a value of 30.

Multiple Choice

The number of gallons of water processed by a city plant was 134,098.07 Which expression has the same value as 134,098.07?

• (1 x 100,000) + (3 x 10,000) + (4 x 1,000) + (9 x 10) + (8 x 1) + (7 x 0.01)

• (1 x 10,000) + (3 x 1,000) + (4 x 100) + (9 x 10) + (8 x 1) + (7 x 0.01)

• (1 x 100,000) + (3 x 10,000) + (4 x 1,000) + (9 x 10) + (8 x 1) + (7 x 0.1)

• (1 x 10,000) + (3 x 1,000) + (4 x 100) + (9 x 10) + (8 x 1) + (7 x 0.1)

Dropdown

Refuel your brain. . . . . . 3…2…1…GO! To represent decimals:

1. Look at the models—which one represents the whole?

2. Use a decimal PV chart; count the wholes; write to left of decimal then count the other parts—do they represent tenths? Put on right of decimal

*Remember MONEY uses decimals. WHOLES = ​

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TENTHS = ​

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HUNDREDTHS =​

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Draw

Write the amount shown by the model.

Multiple Choice

What number did Jorge model?

• 2.08

• 2.8

• 28

• 280

Dropdown

Which value is represented by the shaded part of the model? A.

Select answer