Place Value and Base 10 Review!

20,000 + 6,000 + 500 + 80 + 8

26,588 in expanded form

thirty thousand four hundred twenty-one

30,421 in word form

300+90+4

394 in expanded form

four hundred fifteen

415 in word form

Standard Form

A common or usual way of writing a number using digits.

Base Ten Number System

A number system based on 10.

billions

A period in place value that includes billions(10 digits), ten billions(11 digits), hundred billions(12 digits)

millions

A period in place value that includes millions(7 digits), ten millions(8 digits) and hundred millions(9 digits).

thousands

A period in place value that includes thousands(4 digits), ten thousands(5 digits) and hundred thousands(6 digits).

expanded notation - Multiplication

A way of writing a number as the sum of the products of the digits and the place value of the digits eg. 6753 = (6x1000) + (7x100) + (5x10) + (3x1)

Expanded Form

A way to write numbers that shows the place value of each digit.

Estimate

An approximation of a number based on reasonable assumptions

greater than

Greater than is used to compare two numbers when the first number is larger than the second number.

digits

In the base 10 system, any of the symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. Digits are used to write numbers.

less than

Less than is used to compare two numbers when the first number is smaller than the second number.

period

Place Value groups of 3 digit places separated by commas. Each group has ones, tens, and hundreds.

Round

To replace a number with another number that tells about how many or how much.

Word Form

Using words to write a number.

Ten times

multiplied by ten

ones place

the first digit in a whole number

tens place

the second digit in a whole number; one of these means 10 ones

hundreds place

the third digit in a whole number

place value

the value of a digit based on its position in a number