Number Sense

Expanded form is a way of writing numbers that breaks them down into their individual place values. For example, the number 64,879 can be expressed as 60,000 + 4,000 + 800 + 70 + 9.

The word form of 1,182 is 'One thousand one hundred eighty-two'.

Standard notation is the common way of writing numbers using digits. For example, the number thirty-four thousand, six hundred twenty is written as 34,620 in standard notation.

In the number 64,879, the digit 8 is in the hundreds place, which means it represents 800.

To subtract two numbers, you take the second number away from the first number. For example, if Mr. Mullinax has 462 baseball cards and sells 181, you calculate 462 - 181 to find how many he has left.

The result of 462 - 181 is 281.

Word form refers to writing numbers using words instead of digits. For example, the number 1,000 is written as 'one thousand' in word form.

Place value helps us understand the value of each digit in a number based on its position. For example, in the number 64,879, the 6 represents 60,000 because it is in the ten-thousands place.

To convert a number from standard notation to expanded form, break it down into the sum of each digit multiplied by its place value. For example, 34,620 can be expressed as 30,000 + 4,000 + 600 + 20.

Standard notation is the typical way of writing numbers using digits, while expanded form breaks the number down into the sum of its place values.