STAAR Review: TEKS 4.2A - 4.2H

Front

What is standard form in mathematics?

Back

Standard form is a way of writing numbers using digits, where each digit has a specific place value. For example, the number 9,342,268 is in standard form.

Front

How do you convert a number from expanded form to standard form?

Back

To convert from expanded form to standard form, you add the values of each term together. For example, (9 X 1,000,000) + (3 X 100,000) + (4 X 10,000) + (2 X 1,000) + (2 X 100) + (6 X 10) + (8 X 1) equals 9,342,268.

Front

What is place value?

Back

Place value is the value of a digit based on its position in a number. For example, in the number 9,443, the 4 in the hundreds place has a value of 400.

Front

In the number 9,443, what is the value of the digit 4 in the tens place?

Back

The value of the digit 4 in the tens place is 40.

Front

How does the value of a digit change based on its position?

Back

The value of a digit increases by a factor of 10 for each position it moves to the left. For example, the 4 in the hundreds place (400) is 10 times the value of the 4 in the tens place (40).

Front

What is the relationship between the value of the digit in the tens place and the hundreds place?

Back

The value of the digit in the tens place is 1/10 the value of the digit in the hundreds place.

Front

What is expanded form?

Back

Expanded form is a way of writing numbers that shows the value of each digit. For example, 9,342,268 can be written as (9 X 1,000,000) + (3 X 100,000) + (4 X 10,000) + (2 X 1,000) + (2 X 100) + (6 X 10) + (8 X 1).

Front

What does it mean to round a number?

Back

Rounding a number means adjusting it to the nearest specified place value, making it simpler but keeping its value close to the original. For example, rounding 9,342,268 to the nearest million gives 9,000,000.

Front

What is the value of the digit 6 in the number 9,342,268?

Back

The value of the digit 6 in the number 9,342,268 is 60.

Front

How do you identify the digit in the thousands place?

Back

In the number 9,342,268, the digit in the thousands place is 2.