# Math Current Vocabulary Words

Unit Vocabulary Words

Place Value / Rounding

digits- Any symbol or number (0, 1, 2, 3, 4, 5, 6, 7, 8, or 9) used to show a number

## = -Is equal to.

estimate-To find an answer that is close to the exact amount.
expanded form-A way to write numbers that shows place value of each digit
Examples: 253 = 200 + 50 + 3

> - is greater than
Example: 6 > 4
6 is greater than 4.

< - is less than
Example: 3 < 7
3 is less than 7.

numbers  - describe quantities or values

numerals-symbols used to represent numbers

periods -Each group of three digits in a place value chart; periods are typically separated by commas in a multi-digit number.
Example:  the hundreds period or the thousands period;
85,643,900 has three periods.

place value - the value given to a digit by its place in a number.

standard form- A way to write numbers that shows only its digits

Example: 3,540 standard form

## difference - The answer to a subtraction problem. Example: 8 - 5 = 3                3 is the difference.

estimation- an approximate or rough calculation, often based on rounding.

round-to drop or zero-out digits in a number and change the digit in a specified place using the following rules:-          if the digit in the first place after the specific place is 5 or more, add 1 to the digit in the specified place. This is rounding up.-          If the digit in the first place after the specified place isles than 5, do not change the digit in the specified place. This is rounding down.-          If directions do not state which place to round to, then the implication is to round to the greatest place. The only exception is rounding to the nearest whole dollar.