Understanding Expanded Form for Decimals

What is the purpose of expanding a decimal number?

• To simplify the number

• To show the value of each digit based on its place

• To make it easier to add

• To convert it to a fraction

In the number 75, what is the value of the digit 7?

• 7

• 0.7

• 70

• 700

How do you determine the value of a digit in the decimal part?

• By its position in the whole number

• By multiplying it by 10

• By adding it to the whole number

• By its position after the decimal point

What is the expanded form of the decimal part 0.34?

• 3 + 0.4

• 30 + 4

• 3/10 + 4/100

• 0.3 + 0.04

How do you write the complete expanded form of a number?

• By adding the whole number and decimal expansions

• By multiplying the whole number and decimal parts

• By subtracting the decimal part from the whole number

• By dividing the whole number by the decimal part

What is the first step in converting a number from expanded form to standard form?

• Add all the fractions

• Multiply the whole number by 10

• Identify the decimal point

• Start with numbers without denominators

If a fraction in expanded form has a denominator of 1000, how many decimal places should the number have?

• Four

• Three

• Two

• One

In the number 31.008, where should the digit 8 be placed?

• Tens place

• Hundreds place

• Thousandths place

• Ones place

What is the expanded form of the number 31.008?

• 30 + 1 + 8/1000

• 31 + 0.8

• 30 + 1 + 0.008

• 31 + 8/100

What is the final step in writing a number in standard form from its expanded form?

• Multiply the whole number by the decimal part

• Add all the whole numbers

• Add the decimal and whole number parts

• Subtract the decimal part