Vocabulary Standard form – A number written with one digit for each place value Word form – A number written in words. One hundred twenty-three thousand, seven hundred eighty-nine

Vocabulary Expanded form – A way to write numbers that shows the place value of each digit =

Review Numbers are divided into periods Thousands Ones Periods are separated by commas.

Remember that each period has three place values within the period ThousandsOnes TensHundredsOnesTensHundreds

Tip Do not use “and” when writing whole numbers. The word “and” will be used when you are reading numbers with decimals. Six hundred and ninety-thousand, and four hundred and ninety-two. and four hundred and ninety-two.

How to write large numbers in word form Thousand Ones Write the numbers as you would read them: 1 st Start with the period farthest to the left and write it in word form. 2 nd Continue with the period to the right and write it in word form. Continue this process till you reach the ones period. Six hundred ninety thousandfour hundred ninety two

Write this number Four thousand, two hundred sixty-eight

Write this number Three hundred five thousand, one hundred eight

Standard form is a number written with one digit for each place value Three hundred five thousand, one hundred eight

What is the standard form of this number? Sixty-three thousand, four hundred ninety.

What is the standard form of this number? Twenty-two thousand, two hundred

The expanded form of the number is used to show the place value of each digit , The expanded form of is

What is the expanded form of?

What is this number in expanded form?

What about decimals? When writing decimals in word form, use the word “and” to represent the decimal point. 5.2 five and two tenths

TENS ONES TENTHS HUNDREDTHS THOUSANDTHS

FIFTEEN AND TWENTY SEVEN HUNDRETHS FIFTEEN AND TWENTY SEVEN HUNDRETHS

THIRTY AND TWENTY SEVEN THOUSANDTHS THIRTY AND TWENTY SEVEN THOUSANDTHS

SEVEN HUNDRED FIFTY SIX AND THREE HUNDRED THIRTY NINE THOUSANDTHS SEVEN HUNDRED FIFTY SIX AND THREE HUNDRED THIRTY NINE THOUSANDTHS

THREE HUNDRED ANDTHREE TENTHS THREE HUNDRED AND THREE TENTHS

Let’s Review!

Standard form – A number written with one digit for each place value. Word form – A number written in words. Expanded form – A way to write numbers that shows the place value of each digit. When writing decimals in word form, use the word “and” to represent the decimal point.