Rounding - Finding a number that is close to the original number by changing it to the closest multiple of 10, 100, 1,000, etc., Estimate - A reasonable guess that is close to the right answer, Compatible Numbers - Numbers that are close to the original value and make a problem easier to solve mentally, Solution - The answer to a problem, Place Value - The value of a digit based on its location in a number, Hundred Thousands - A place value that is 10 times larger than the ten thousands place and one-tenth the size of the millions place, Thousands - A place value that is 10 times larger than the hundreds place and one-tenth the size of the ten thousands place, Hundreds - The place value created when you combine 10 tens, Tens - A group of 10 ones, Ones - A numerical value (0-9) with only one place value, Sum - The total of two or more numbers added together, Difference - The distance between two numbers; can be found using subtraction, Product - The result of multiplying two or more numbers together, Quotient - The answer to a division problem, Whole number - A numerical value with no decimal or fractional part,

Estimation and Compatible Numbers

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