Addend - A number that's being added with another number, Consecutive - numbers follow each other in order without any breaks, Natural numbers - Numbers you count with 1, 2, 3...., Difference - The answer you get when you subtract one number from another, Equation - A math sentence where you have two expressions that are the same, separated by an equal sign, Estimation - Using what you know to get close to the real answer, Expression - Math symbols and numbers that don't have an equal sign, like 5 + 3 or 2 × 4., Fluency - Doing math quickly and correctly, Minuend - The number that you subtract another number from, Perimeter - The distance all the way around the edge of a shape, Polygon - A shape with at least three sides, where all the sides are straight lines, Rounding - Changing a number to the nearest value that is easier to work with, like rounding 15 to 20., Subtrahend - The number you take away from another number, Sum - The total you get when you add two or more numbers together, Whole numbers - All the numbers you use for counting, including zero: 0, 1, 2, 3...,

3rd Grade Add/Subtract Vocabulary

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